I was prescribed 100mg. Almost immediately, I had horrible acne, ...

I am on lamictal 200mg a day and seraqual or however you spell that and I feel really light headed and I feel the weigh gain plus I just stopped valium because I was having breathing problems plus I stopped cymbalta so I only take the first two things listed plus a vicoden and a half a day for pain which my doc does write me just to let you know it is a perscription I have.My breathing problems stopped stopping the two but my light headedness and foolish dreams and weigh gain is driving me crazy.Help what do you think it is????