I get pain sometimes when even a shirt brushes my back like the skin of my whole back is super sensitive to any touch. However not all the time. I also have blackouts from standing to quickly thinking its a blood pressure issue, low blood pressure aswell but docs not concernes.

Floaters and dizziness are unfortunately part of my every day routine (8 years). Floaters apparently comes with aging, (floaters are a natural part of the eye's aging process. As you age, your vitreous gel shrinks and may detach from your retina), also I am terribly near sided. But of course it is good to have your eyes checked as you did, especially if you have other visual symptoms or pain. Dizziness could be from many things from anxiety, to medication side effects, to inner ear problems, blood pressure, hunger and of course maybe just fibro. The sore scalp, I just have it, always had it, mostly when I comb my hair or touch the scalp otherwise rarely bothers me. Sorry for your experiences : ( Fibro never stops providing us with wide variety of scary and unpleasant, down right painful symptoms.
My dizziness is called chronic subjective dizziness and I am pretty certain that it is caused by the over active nervous system, see article below, it really helps to understand whats going on. http://www.canadianaudiologist.ca/understanding...

The back of my head is always super sensitive. Makes it hard to sleep. I've had the eye floaters for years and experience low blood pressure and low body temperature often.

I have all of that at times.

Yes i get all of this regularly. I find if i stand up slower or prepare myself for standing up its not so bad. My scalp hurts and days like that i use a kirby to put my hair back instaed of a bobble because i feel the bobbles pull and hurt more.