Sloan,
I'm so sorry to hear of your problems, this definitely takes a toll on relationships. I can't help you with the medication question, might be best to ask your doctor about that. I understand the good day/bad day thing, it sure gets frustrating when you feel pretty good for a day or two, gain some confidence, think that maybe you are finally on the right track, only to have it all fall to pieces again. It always amazes me how quickly the confidence can evaporate when the anxiety returns!
I went through a period of time a couple of months ago when I couldn't sleep too, it was miserable and made my anxiety so much worse. What finally worked for me was to leave the tv on whenever I needed to sleep. I'd put the volume very low and put it on the most boring channel I could find...for me it was the weather channel... so I wouldn't be interested in watching it at all. It was just enough distraction to keep my mind occupied, but still allowed me to fall asleep.
At the same time I went through the insomnia, I also couldn't eat at all, lost 30 pounds. I just ate tiny amounts as often as I could and stuck to mostly soft foods and soups. Drink alot of milk and maybe try some supplements.
How long have you had anxiety? Have you read any books on the subject? I find that reading and getting as much information as possible has really helped. My favorite books are by Claire Weekes, you can find them at amazon or e-bay if you are interested. I do hope that things will get better for you, and I hope I've helped a little. Keep posting here, the people are amazing and so understanding.