Hi thanks for the quick reply!
I've had the problem for a while now and 3 years ago had the exact same problem on my left arm. With my left arm I had the problem for a long time (around a year and a half before getting it diagnosed) NHS physios and ortho couldn't diagnose it, MRI showed nothing so went in for arthroscopic surgery which again showed nothing but afterwards a physio whom I met at a boxing event quickly evaluated me and told me I had shoulder impingement. I didn't do anything with that shoulder and it took 3 years to finally heal. I'm just worried I don't have to go through the same thing with the right one!
Unfortunately I can't afford to seek private help anymore so will have to go back to the NHS. Is there anything/anyone i should specifically ask for and in the mean time what should I be doing? Currently I do the supine and prone rotations along with roations on a shoulder horn, pec and lat stretches and scap push ups.
EDIT: Also I feel clicking when I squeeze my shoulder blades together my phyiso explained it's nothing.