Hi, I have had 2 IM injections in buttocks, and 1 day after the injection in right one it got swollen and hurts a lot, I have difficulty walking and have been taking pain killer which helps but it keeps coming back, its been almost 6 days and I still its swollen , I had bad fever soon after i started experiencing the swelling , and now with the second injection on my left buttock its swollen too after 2 days , it was normal but started swelling and hurting as well. I have never had issues with syringes before