I'm SO tired! Please help.?

I have been diagnosed with gen. anxiety disorder about 2 years ago. I've been on effexor and wellbutrin for it and I've been great until recently. About around 6 months ago, I started getting really tired. I can't go to sleep until at least 2 am. If I try earlier, I just lay there. Then I can't wake up until 4 in the evening at least. My doc put me on rozerem but I sleep more instead of less. Its also 50 bux a month for me. When I told her, she said to cut it in half. Is there anything else you suggest I do??