Welcome to HealingWell. I hope we can offer you a little sympathy/ideas for how to proceed with your meds. (Note: I didn't actually edit your post. I was going to edit the poll, but didn't.)
I think LFW has the right idea -- be completely up front with your pdoc. Explain your concerns. He/She may have good reasons for wanting you off the lamictal now, but you should get a chance to explain your point of view as well. Also, you may wanna give the seroquel more of a chance. It will help with your sleep, that's for sure. But the best bet is to be absolutely frank with your doc.
Co-Moderator, Bipolar Forum
It is a melancholy of mine own, compounded of many simples, extracted from many objects, and indeed the sundry contemplation of my travels, in which my often rumination wraps me in a most humorous sadness. -- William Shakespeare