I am in week 9 of teste 500mg/wk. I switched brands about two weeks ago, maybe 2 1/2 wks ago. I have done7 or 8 injections. All of a sudden my quads (injection site) have knots in them that feel like charlie horses. It has been a week on one side, and 3.5 dys on the other. I had a killa wheels rooutine in between and I am thinking that has something to do with it but hte pain is not going away or receding. I can hanld eit but it is enough of a deal for me to ask for yuo guys input. WHat do you think?