Recently I've been having a sharp pain where my delt/ bicep meets my chest muscle. This seems to happen while doing low rows or dumbell rows on back days, I've also noticed a drop in strength in Bench exercises. It's a very sharp pain and I am unable to train back very good and it only happens during back days. I can do pulldowns pain free. Anyone have a similar problem and what would help this? I do not take joint support because I've never had a problem until now