Cellulitis?

I think I have cellulitis in my left arm. Going to ER in morning. My arm ached so I wrapped it but it was a feeling that I had never had before. Took off wrap and saw my arm was red & splotchy. Painful, hot to the touch. People with lymphedema have greater risk of developing an infection. I can't see any cuts or scrapes except on one cuticle. I did have braces put on last week so maybe that had something to do with it??

I took an azithromycin from my left over stash of antibiotics. I've been scaring myself by looking online. Entire arm aches. I'm scared because of the last infection. I'm elevating it for now. I really do not want to go to ER.