Two fridays ago, I began having a pain in my left shoulder when I was doing some single arm pullthrough's on a machine, being the dumbass that I am, I kept going on that exercise, and finished the rest of my back workout. I paid for it that night and the next few days as I couldn't do shit with my left arm. I took off two days and did legs the next time I was in the gym. The tuesday after that friday, I did chest and I went pretty heavy and although I could tell something wasn't "right", I didn't feel any pain. The next day my shoulder felt normal for the first time. So, I did shoulders the next day and I was pretty cautious about what I did, I felt no pain yet again and had a solid workout. Yesterday, I did back again and on the first fucking set of my first exercise (wide grip pull-ups), I felt pain. I kept going again and finished my workout. I'm paying for it again and I'm back to where I was the previous week. I did some calves today and then tried to do dome biceps and couldn't even do it and had to quit. When I raise my arm forward, as I'm bringing it down, it hurts.. when I raise it and lower to the side, it doesn't. Any ideas what the fuck is up? Should I not even do chest on Tuesday? I hate not going to the gym, btw.