mania is associated with large appetite to food and not loss of appetite
Since you are bipolar. Quiting something can start up a MAJOR withdraw attack. People will get this confused with Mania, but it is just a withdraw but 10 times worse since you do have this disorder. You have to start taking your meds and quit the weed. Fight through the withdraw symptoms. Go to a focus group or counsiling. Because every time you start and then stop weed this is happening, you need to completely stop. Fight!
I wish you the best of luck. Any change in your environment can be tough with bipolar disorder. The brain with bipolar disoder simple doesn't adjust to change very well. But you can do it! I've done it before, and I have bipolar 1. I'll be cheering you on. :)