Backbiting at work! When is enough enough??

*deep breath* here it is....a while back a nurse was hired prn who is really...out there...well..she has since made quite a few enemies and had conflicts with just about all the nurses on our shift except for me...til now. i suspect that she is bipolar or something...she has bragged from day one about unprofessional stuff..like her drug addict son, her smoking pot/doing xanax with him, her multiple sex partners & marital affairs to her watching tv in a residents room at night not to mention the constant belching/farting she does in front of visitors and whoever.....mind you shes a good suck up. well...we just got another new prn nurse whom we both went to school with ...and a coworker of mine told me tonight to "watch my back" because prn # 1 who i will call "bipolar" told the new one to watch out for me because i will get her in trouble and im in the don's ear all the time and that i think i know everything and that i think i run the shift and that it couldnt be done without me etc etc etc ".....well...this same nurse worked with me last night and was constantly asking me for help which i willingly gave her without question because thats how i am..i dont let my coworkers sink when in a crunch.....even though i was well behind in my own work. i am not in anybodys "ear" about anything and ive yet to get someone in trouble...aide or nurse. i basically stay to myself. i go in and do my work, go home...thats it. im not loud or obnoxious or disrespectful to anyone...instead of confronting her on this...which i have no doubt she made these false statements to the nurse......im going to let it go...but the very next time she asks me for help...i absolutely will not do it. i will let her sink. i just cant stand for someone to talk junk about me behind my back and then be all friendly to my face like that. it irritates the fire out of me! i am the charge nurse on my shift but i by no means "run" it..or anyone on it. im not mgmt...and as for the don...we have only a professional relationship. i think where this misconception has come into play is because since i am the charge nurse and i work the most shifts of anyone else on my shift and 3rd shift...so when she calls to check on things she asks for me because im there allllll the time....she counts on me to make sure things get done because as time has proven ..when im off things fall through because no one else stays on top of the paperwork etc etc....i always keep up with it. yet, this gives others like her the wrong idea. yet.....she plays online computer games with the don and calls her at home to give game instructions etc. i intend to talk to this new nurse to deter her from hopefully buying into anything that has been misconstrued about me or my work style or my relationships with my coworkers. my motto has always been that you dont have to like everyone you work with but you should make the effort to get along with them for the x amt of hours you have to be around them. and sure, there are alot of things about some of my coworkers that realllly bother me, but when im on the clock and have to be stuck with them i try to make the best of it so that my 8 12 or 16 hrs isnt pure miserable hell. up to this point i thought it was ok to be like that. i dont get it. im not bossy or anything towards my coworkers. however, i know that the aides on my shift cant stand this particular nurse...they absolutely cringe when they see that she is down to work. i feel so backstabbed by this. i know it shouldnt bother me as much as it is, but it does. even though im a bit hurt and alot offended by her false words against me, i know that im a good employee and a good nurse. im fair, im honest and im knowledgable about what im doing 90% of the time and when i question something i ask for assistance from a higher up or whoever is available to me, whether thats the md, don or whoever. i dont think her assumptions are fair nor correct. i also dont like the fact that she is putting a bad taste in this new nurses mouth about me. i am so not into drama and schemes and back biting. i keep my mouth shut unless something is absolutely necessary to be made known. i wonder how she would feel if i did put a bug in the don's ear that she prepulls all her meds? and brags about it in front of staff and families? or that she discusses her genital issues with everybody who has ears? or about how she calls the don all kinds of names behind her back but plays games with her? or about the fact that she has been fired from 3 other snf's for bad conduct such as cursing out the don's, complaints from staff and families etc... not a good outcome im sure. lucky for her, im not that kind of person. & stay out of other peoples personal lives. maybe i should just find another job and start fresh with people i dont know? id really hate to do that since we are about to switch to what ive been waiting for for 3 yrs...12 hr shifts. i dont know....ill figure something out.....this weekend...starting with getting my cell number changed so that i dont have to get another stupid text msg from this backstabber ever again...it might be time for me to put in a request for 2 or 3 days off. i just know that i dont have to be so disrespected without just cause. if i pointed out every single flaw or fault i find in a coworker i would be unbearable because i work with all kinds of personalities from true know it alls to those who work harder at getting out of work than actually working, to those that have slept on the job, came in hungover, but she is in a class of her own. i cant even fully describe what she is.