Suggest Treatment For Pain In The Shoulder And Chest

hi. I ve had an annoying pain in my shoulder and a little discomfort in my chest now for 1 year and 8months but spread over that time so I kept getting it everything 3 months then went away then came back 3 months later and it would last normally a month but this time I ve had it for 5month straight and it causing me stress anxiety s and my temper is worse . I went the to see my gp last Thursday and she booked me an xray for Monday so i went for my xray and the nurse says I heve a little bit of fluid on the right lung but she said her and the Dr are not worried about it a sent me home and would send my results to my gp. but now I m worried even more to hear that and I don t no what to think is it really bad should I go to A+E. I can t carry on like this it s make me upset and run down but other than that I m fine.