Do you think the zyrexa has helped you? If you think it is time to try another med I just discovered clozapine comes in orally disintegrating tabs. I know weight gain is a big deal for you and while anecdotally I've read clozapine is worse, the studies apparently show zyprexa is associated with more weight gain. My guess would be that people often respond to a fairly low dose of clozapine and the weight gain is (for me at least) dose dependent.

I think it sounds like you need your therapist to help you more than anything but since I was just reading this for other reasons I thought I'd throw it out.