Rude Preceptor

I just recently started a second job as a RN on a bariatric unit ( I also work at a psych hospital). My preceptor has been a nurse for 30 years and is precepting both me and another orientee. However, she is very rude to me and talks down to me most of the day. I try not to get upset when she talks to me that way. for example, I asked her what suppiles did I need to d/c an ON-Q medication pump, just beneathe the skin ( my first time). She told me to get the supplies then when I d/c the pump, she proceeded to take me to the side outside of the pt's room and tell me that I sould have brought a bag to place all of the dirty materials in. If she wanted it that way, then I wander why she had not told me when I asked her what all to bring. I have been with her for 2 weeks now and 3 pts/family members even have picked up on her demeaning ways toward me. My pt today told me that she talks to me bad and that she is way harder on me than the other orientee who she precepted the last 4 hours of a 12 hr shift ( I work only 8). Another pt said that she should know how it is to be new somewhere. I am not blundering around, I get all of my work down in a timely fashion and provide good nursing care but this preceptor seems to get upset because I ask her about technical stuff due to me not being exposed to all procedures and equipment. Then on the other hand she pretends to be so nice to me.

What should I do? Am I being eaten because I am young?