I lost my vision like it was fading away like static and started to shake and it was hard to breathe in and out I'm not sure why but I got out of the shower I had a red spot on my mid back on top of my spine what could be happening?

Do you have any medical issues?

None except I hurt my knee 2 weeks ago and have a little fluid and I'm eating a lot but according to my doctor I've lost 30 lbs in a month and a half 142 to 114 in just a month and a half