i have started my first cycle of sustanon 250 at 500mg a week.i am injecting eod.the thing is i started off with my left quad on monday and my right on wednesday.my quads felt very tight and painful the day after.i have acutally been limping.i must admit that my left quad is starting to get better.i done everything by the book.hot shower,alcohol swap, aspirated with no sign of blood,1"needle etc.is this something that some people experience? and am i ok to try my pecs 2nite? thanks guys