To me it sounds like you injected air bro. This can happen when your injecting, and the rubber gets to the bottom of the syringe and you still keep on pushing to get every single lil bit of oil out through the needle. Once the rubber has come to the end, then stop. If you keep on pushing on the rubber a bit of oil left over will go into the muscle with a majority of air also. I had a lump, didnt really hurt much, and the lump was pretty hard. It was there for about 5 days, and by the 7th day it was totally gone. To cure this, just massage the lump slightly every night before you go to bed, and a few times during the day also when ever you have time. And when your in the shower, massage it under the hot water too. Not only does it feel good but it helps too hehe. I dont think you have an infection, but I could be wrong. Just my opinion, good luck and stay lumpless
-Gear