I wish I could give you some advice, but to be honest I too am completely stony broke. I managed to get a part time job at the local kennels, but to be honest it is such hard work I don't think you could do it with fibro. Go for disability - at least it would be something.
Good luck - and I sympathise on the takeaway issues. Sometimes it just doesn't seem fair, particularly when all your friends are making mega bucks.
Remeber though that money isn't everything (although it does really help!). Your health and happyness are nmore important, so try not to get too stressed.
Fingers crossed - the vet nurse thing sounds great.