I had been on Lithium for a few months when the consistent weight...

I had been on Lithium for a few months when the consistent weight gain and uncomfortable bloated feeling caused me to seek out a new treatment for my bipolar disorder. Deciding on Lamictal, I started the slow transition of lowering Lithium doses and increasing Lamictal doses. About one month ago, the transition was complete. I didn't seem to have any real noticeable side effects from the Lamictal but after about 2 weeks of being off the Lithium, my skin started breaking out with acne!! Terribly on my chin, cheeks and hair line. I am now wondering if the Lithium may have been keeping this symptom under control. Has anyone had an experience like this?