Hi Rose,
I do believe you may be suffering from bipolar, (from what you describe, but I am no doctor). I have suffered with bipolar for many years not knowing what it was. I thought it was just depression because lets face it I spent nearly three years in my room, literally, with the door closed. I don't even remember going outside during that time, that's how bad my depression was.
Then the mania hit, and it wasn't like being god or anything, just staying up all night on the computer and spending lots of money and drinking. ALOT. The believing I was talking to Jesus and I was a witch came AFTER I took antidepressants which sent me on a tailspin to a whole different reality. The thing is it was the pills that sent me over the edge. I never heard voices like that until I took them.
So. keep visiting the bipolar forum and have another talk with your doctor and T about what you are feeling so maybe they can adjust your medication. Seroquel and Lithium didn't help me at all. One made me fat the other made me a zombie. I am on a balance of Haldol for the thoughts and Ambien for the sleep. You just need the right dosage of the right medication. Good luck and please do keep us posted