Yesterday during my workout (chest, shoulder, triceps) something really odd happened, while doing incline bench press, one of my shoulders "popped" it didn't hurt, I was able to finish my reps. Then it popped again while doing dips, no pain, just an odd feeling. Today I'm not aching or anything but I'm concerned I might be pushing my shoulders to the limit and raising the risk of an actual injury.
Are these type of events normal? I've been working out for a while, but I've never heard/felt my shoulder pop before.
PS It was the left shoulder, and I'm left-handed, I don't know if that's a relevant detail.