Hello, I think I may be having an allergic reaction to a drug prescribed for me. Started taking Hydroxychloroquine 7/13/17. Yesterday I developed a small rash that covers my stomach, tongue is swollen a bit,reddish and sore/tender. I just took a couple of Benedryl to see if it helps with the rash, it s itchy. Anything else I should do other than stop taking this med?