Hi, funky! I haven't had anything exactly like that, but I am bipolar and sometimes get depressed because of anger, not just internal factors. An have felt sucidal then. I've heard depression defined as "anger turned inward." Bipolars can also have symptoms because of environmental factors. After all, we are still human!
I assume you are going to be kept on the Lamictal and still be considered bipolar. I took it for years. I have never heard of it causing those kinds of symptoms. My two cents' worth, anyway......
I am sorry all that happened, and I am sad to hear about your bird.