First, the suggestion about a food log was an excellent one - maybe start a diary here on this site, in the diary section, to catalogue food/exercise, etc?
Also some people find that when they are in a rut, dropping or raising (yes I said raising!) the calories by 200-300 a day can snap them out of it.
But unfortunately, if your meds have weight gain side effects, you're just going to ultimately have to keep plugging away at it. You're making progress, keep your hope up! It's just slower than you want, but it's still MOVEMENT in the RIGHT DIRECTION!