Okay so ive done 3 injections so far...and Im guessing its just cuz of virgin muscles, but my glutes are so tight and sore for 2-4 days post injection. Im using a 1 inch 23 gauge needle (just ordered 1.5 inch 25 gauge. heard its better for glutes). Maybe im moving it around a little too much when I do it?? Anybody have the same problem when they first start up a cycle? Suggestions???