Aviza, it seems as if it would be very difficult to know how all those medications are affecting your metabolism.
Personally I had something very similar happen when I tried going off my 1 med, Prozac, about a year ago. I kept cutting way back on my food, but it didn’t help; every little thing I ate applied itself directly to my hips. Once I started back on the med things returned to normal.
One thing you might try that helped me was to try boosting my metabolism by doing a bit of exercise an hour or 2 before dinner. Walking up and down stairs, lifting weights, that sort of thing.