Hi! I injected into my shoulder at wednesday and soon after the shot I got a red lump, I checked on internet what that might be and it said nothing special and I should just massage it under hot water. 3 days after the shot I got fever and the area which I injected to became hotter and really painful and I couldnt move my shoulder. Today day 4 after I woke up still cant move my shoulder much and theres less pain but the redness became inch longer and its been getting bigger all through the day, now its all way to my elbow. What that might be?