Last week during my chest shoulder workout which consists of standing military press(barbell), incline bench press, flat bench press, and behind the neck bench shoulder press on the smith machine, I felt a little discomfort in my left shoulder after bench press. It wasn't enough to prevent me from finishing the behind the neck presses. Today I worked out the same work out, but dropped the behind the neck presses and substituted weighted dips in because I read only a small percent, like 30 or so can do behind the neck presses safely, but I had only been doing them for 3-5 workouts.
Today I felt fine during my workout, still lifted very heavy, everything in the 3-5 rep range. I still have a small ache in it, and have since the last workout. Hasn't gotten any worse. I have been icing it. I take lots of fish oil and one or two joint supplements. I just want to be sure it doesn't get any worse and I would rather change something now that have problems in the future, I am only 22 years old. Never had an injury before. Should I just keep lifting the same way and see if it goes away or change something?