Anyone have severe problems with staying awake with being on soooo many meds for bipolar and OCD and Anxiety??

I am Bipolar, have OCD, anxiety and am on Prozac, wellbutrin xl, depakote, clonazepam, xanax, and a couple other things. I work in a job were I stand all day and am in the dark a lot. I have a HUGE problem with staying awake during the day and even moreso in the afternoon while driving. This scares me, anyone else have these problems. I have also lost a bunch of weight and when I loose a good 10-20 lbs we have to change my meds and I end up horrible for weeks/months at a time. I am basically miserable for the time being. Anyone else with similar issues. My doctor and I cannot seem to find a good regimen for me with my meds and although i will not stop taking them I am kinda giving up on getting it right. My job is suffering and i am in possibility of loosing my job if my performance goes down. What to do??