I've never worked as a nurse... just as a CNA, a waitress, a college student, and a million other things that require an attention span and focus greater than my spastic gnat-like reticular formation can easily handle. I can picture myself in your position easily... I hope I never have to go through what you did. I feel distressed just thinking about how you must feel.
I definitely agree that alternative approaches are essential to managing and improving ADD symptoms. Meditating, for example, have been proven to provide significant improvments in ADD brains. UCLA has done some cool research on this! http://www.adhd.ucla.edu//index.php?...d=16&Itemid=33
When ADD really interferes with my life, my symptoms are often indistinguishable from depression. I can't focus on anything important, I feel like I can't get anything accomplished, I'm overwhelmed, I just want to quit because I don't feel like I'll be able to keep up (actually, I KNOW I won't be able to keep up). And when it gets bad - like if I had decided to go off meds, because I felt in control, then I took on a new responsibility, Ritalin is a start to getting my mind back on track. Once I resume medication, however, the hard part of getting myself on track begins. I guess that's where you are now!
It sounds like you had a crappy employer, and having an employer who doesn't make any attempt to empathize and help you succeed sucks for everyone. I've read on other 'nurses with ADD' threads about different settings that worked for for some people (search ADHD on this website)... but maybe the biggest thing is having an employer who wants you to do well, and can tell the difference between you being lazy and you working hard but being overwhelmed. Treating a talented person like they are incompetent or bad at what they do is a good way to stress them out and make them bad at what they do. Yeah, you need to be organized and work on yourself, but you also need a boss who recognizes that you are working hard and need support.
When you go back to work, remember that you are talented, you are caring, you are hard working, you don't "falsify medical records" nor are otherwise dishonest, and if your coworkers are baselessly accusing you of whatever it is to cover their own butts. You need to be confident and consistent when you make your own arguements, or else you're too easily pushed aside. (Just remember to be talented, caring, hardworking, and honest when you go back to work.) If you excell at patient care (which is what it sounds like) but you're having trouble with organizing the other responsibilities that comes with the job, you should not be portrayed as some kind of bad person... you just need a little support and understanding.
At least, this is what I've learned in other environments, maybe nursing is different.