haven't gained weight on it. I think its usually weight neutral.

But if you get more agitated while depressed and the lamictal made that simmer down, maybe the weight gain is because some of your former symptoms kept your weight down? In my own life, I had problems maintaing a steady weight before proper treatment, and for a while there I was straight up emaciated. Once I got treatment, I blew up like a blimp, and a lot of that was because I never learned proper diet, etc., and I'd basically been relying on my craziness to keep me svelte.

Just thought I'd throw that out there for you. I hope things get better for you.