How can I reduce the pain resulting due to clavicle fracture years ago and live like a normal person ?

I am 22 years old and broke my collar bone severly when I was 16. I have always had aches and pains that come and go in various intensities,but recently the pain has progressed to a point where it is effecting my sleep and many other things. I am very active and have not been able to perform as well as normal, I get shortness of breath , and sometimes the pain gets to a point where i have to stop whatever I m doing and tAke a breather. I stretch it regularly and have my girlfriend massage it, but that only offers very temporary relief. Whenever i move my left shoulder there is a grinding, cracking, and popping that can be very painful. There is so much tightness in my arm pit I am afraid to touch it sometimes. What are my options for living with this injury? It has got to the point where it is noticeably affecting my life for the worse.