I was given 500 mg levaquin for a bad`sinus infection. My doctor...

I was given 500 mg levaquin for a bad`sinus infection. My doctor wnted to nip it quick because I take a drug that lowers my immunity because of Rhumitoid Arthritis. After 3 days I broke out in a terrible rash all over my body. Since I had other allergies to antibiotics I figured that was what it was and it couldn't be much worse than the sinus infection. I was wrong. Now I have swollen joints. My knee is at least twice the size it should be. I feel horrible everywhere. I am so tired I can hardly function. I have enough health problems without this too.