I totally agree with Ellie; any pdoc, esp one that dxd you with bipolar and doesn't return calls is horrid!
It is NEVER smart to just quit taking meds, and Lamictal is one of them. Always check with your doctor before discontinuing medication. You are also running the risk of depression, as it has an antidepressant effect, too.
There is a Registered Pharmacist on this board, her name is Dana, she can tell you more.