i have done 3 injections in the butt, sust 250. i use the best sterile technique but 2 sites are redhot and itchy and have small knots. They arnt growing and they arnt to bad. i can bare it ok. I cant go to the doc for 3 days and i just bought benadryl advil and steroid cream. this is my first time injecting stuff. advice from other users?