Have you been checked for lupus? That is very similar to fibro and I think the skin gets blotchy. You might head to the lupus forum and see what those members have to say, too.
BUT, you really need to get a good board certified rheumatologist that treats fibro patients as well as these other illnesses. One who will listen to you. You seem to be in a panic and I don't blame you when you have all this going on and no answers. We all are just guessing. You need good, medical answers so you can start getting the help you need for what is diagnosed.
Sherrine