Lamictal & Seroquel

I’m wondering if anyone has experience with these 2 medications?

I’ve been on Lamictal for about 2 years. It was working until it wasn’t anymore and I needed something for the hypomania. Today I was prescribed Seroquel to take as well.

I’m specifically terrified about the weight gain aspect. I had problems with eating and weight throughout my teens and I don’t want to go through something like that again.