About a week ago I was warming up for flat bench and I did a few sets of 135, then on my first set of 185 on the 2nd or 3rd rep I had a pain in my rightt pec, I racked the weight and discontinued the workout. I just tried to warm up today, about a week later and I noticed some minimal pain still in my pec. What sort of injury is this most likely to be? 185 isn't heavy for me at all, so I don't see how I injured something when I wasn't even doing a working set. I don't want neglect my chest any longer, but I'm not about to bench heavy when I know somethings wrong.