Stop taking any over the counter prescription at the current stage wont help you.
Is hard via a web to diagnose and perfrom testing you need to see a Dr or physio to perform the whole interview process
You can work out when pain free though at the curreent state you can do the rest of the body abs legs etc so you wont fully miss out on training days.
Is it painfull when perfoming weigth free movements? if no start adding some weights such as start off with a 1kg weigth. i know is a lot less from what you do but when an ijury accurs the muscles forget and act like they never trained before.