sounds like you have not gone entirely past the fatty layer subcut and most of it did not go into the muscle I.E big ball of oil under the skin which can cause local bruising. Apply heat. Helps to disapate the oil, you will absorb it eventually (3-5 days) If it goes red and gets warm and you feel tingles locally and you have a temp then it is an indication of infection. It is possible that you nicked a vein but thats no big deal, not a worry. Just keep an eye out for infection and shoot the glutes next time. By the way, what kind of test was it? Prop? and how many mls of fluid did you inject?