what's next

ugh!  As if things weren't bad enough with my health, my work has to be a royal pain in the ass too!  I work with people on welfare to help them become employable. I carry a caseload of people that I work with one on one.  I also volunteered to teach some classes about a year ago as the classes we offered were really not getting to people.  So, I took on an extra role and started to teach these classes.  They really seemed to get to people and the client's were enjoying them.   Since my health has gone downhill, one of my co-workers is out to sabotage my job.  She has been a major source of stress for me.  At any rate, the things she has pulled have not made things any easier for me. She complains about how I operate my classes and any little thing she can find to try and get me in trouble.  At that point, I decided to take that ball out of her court. I had my doc write me an excuse to no longer teach classes due to my health.  Well, that just seems to have made the supervisor angry because now she has to change things around. Instead of dealing with this person, she just lets her get away with her complaints and nit pick about things.  Well, I turned the tables the last time and made my own nit picky complaint about the other co-worker and was chastised for it. I was told to let my supervisor handle things that don't concern me. I "need to concentrate on getting my participation rate among other things!"  WOW!  So, I am just fed up!  Well, that is interesting.  Supervisor certainly caters to this co-worker and all the nit picking she does about me does not concern her....
I hate my job and really just want something else. I feel trapped because with my health the way it is, I am not sure that I could keep a job because of all the sick time that I use.  My health just gets worse because of the stress I feel here at work....UGH! what to do! It is all a vicious circle!