SEROQUEL :Hi, folks I suffer bi-polar "mixed state" along with every damn anxiety in existence.?

I have been under the care of a Vpsychchiatrist for 7 years, and with success until- I was put on Seroquel, slow increase 50mg up to 400mg. The stuff basically put me in a coma, but did settle me down. The other meds Lamictal, & Xanax. After about 6 months, usual blood work- well you have high BP, high cholesterol, and thyroid problem. WHAT? So I had trouble focusing with Seroquel, have been off for 5 months, very short term & long term memory loss and lots if "did I tell you..." yes you did. At least 4x a day, and I don't know, extreme slight headache, fog, memory, and comprehension every day. After 5 months I would think the head would be clearer - and it's not, seems to get worse. My doc wants me on it again but I am so so scared- I already have enough brain damage. Anyone experiences? Sorry for the novel. Thanks for your input & experiences.