Injured my hamstring on squats. It wasn't severe, but I stopped anyways to avoid worsening the situation. It's at 100% now. It did mess up my routine, however, because I couldn't train legs for the remaining session. Did an improvised bicep/tricep split instead. I tested out my bench prior to that, and my shoulder still gives me problems. Perhaps I should consult a sports doctor about it. There's an office for that right next to the high school.