Bro, if you don't have a really bad fever your probably fine.
Although I have to ask, did you use 91% alcohol. and then switch your needle after sticking it in the vial.
With quad injections they are horrible unless u use a deferent needle then sticking through the plunger.
Also, on my first quad shot, my leg hurt for 5 days. I didn't go back to the quads for another 2wks. But, I tried it again because I hate sticking it in my own ass... Too hard to reach around. Same for me on shoulders, hard to reach and stay relaxed.
Well here's the thing.... After that I started shooting into my quads everytime they completely quit getting sore.
After you shoot into your quad be sure to rub it in a circular motion to get the solution to move throughout the muscle.
Also, sometimes you can shoot right next to a nerve which will make it hurt for days.
If the pain gets worse in your quad or starts to feel really warm. You may have an abcess.