Thanks for the replies.
I was in the gym yesterday and trained my chest. Straight away with dumbells I knew I couldn't go heavy so I decided to superset therefore, I decreased the weight i was lifting by 50%. To clarify, I performed a superset on the same muscle (chest), alternating dumbell flat bench press and dumbell incline press. I was really just seeing what effect it would have training with a much lighter weight but still pushing myself.
It didn't seem to help, I still got the ache, and it is much more blatant now i.e. definitly something not right. Could the fact that using half the weight I normally use still causes the pain narrow it down to anything? For example, could you say, " ok so it can't be a ligament you have damaged because etc etc etc" - just an example..
For the record, I can generally stretch my shoulder fine, can't seem to trigger the ache without actually training. And another thing, when messing around yesterday, I performed some front raises and it really didnt feel good on my left shoulder.
Does this give anyone any more of an insight or am I still at square one? I will be seeing a physio, however, I am still waiting for my appointment to come through