I'm so sorry to hear of your difficulties! That's so much for someone so young! I've dealt with fibro for many years but never had anything like the things you're going through, thank heavens!
I would try contacting Angel Flight, a group of private pilots who will fly (in their personal small aircraft) patients to and from medical appointments. I don't know if Mayo has such a thing as a place for out-of-town patients to stay (for free or for nominal cost). At least maybe some of the high cost of travel might be allayed.
If you are in the US and you're not able to work, try contacting an attorney to file a Social Security disability claim, so at least you could receive some income and Medicare. It takes a while to get through the system, but it may be an option until you can recover.
I wish you the best - medical care, recovery of your health, and a good support network, Karla B