Laura and Kride,
Welcome to the HW family.
I was on Lamictal for almost 2 years in the past, and it stopped working after that. Lamictal tends to have a anti-depressant effect on some people. But it can also be not enough to treat the depression that goes with BP.
The only thing that I have taken were anti-depressant, which made symptoms worse. I have not used 5-HTP, SAM-E, or some kind of homeopathic drug before. But before you start taking them, talk to your pdoc if it would intrfere with what you are currently taking. You shouldn't start or stop with any meds without your pdoc's knowledge. I hope your depression gets better, best wishes!