So Friday I pin my ass. No blood when I aspirate and no blood when I take the pin out. Yesterday it was sore as fuck and swollen. Today it is sore (not as bad as yesterday) and still swollen. it is not red or anything. I do not have a fever. How can I tel if it is an infection? Or did I miss the muscle and put the 5cc of fluid behind it? 1cc test and 4 primo