Hey, I was wondering if anyone had any advice. i recently made an injection in my right butt cheek. now approx 4 days later it it feels like there is a grapefruit in my a** its hard and very sensitive. no discoloration and no fever no redness at the needle hole. will it pass or should i see dr. everything was sterile, im kind of worried because the test was from a new source (however i know many people who use the same source without any problems.)thanks for your help