Upper left shoulder and rib pain

I am a 26 yr old female.For the last 2 1/2 years I have been in constant agony. Everytime I inhale I get a sharp pain under my left shoulder blade that radiates down through my ribs. Also sometimes when I breath in my spine and ribs will pop. I also have alot of neck stiffness, and everytime I rotate my neck right to left it pops in the same place. I have also had issues with tingling and numbness in both of my legs ( mostly when I am jogging). I have also experianced tremors in my left arm, where it trembles uncontrolably.
I have been to my doctors ( kaiser) 8 times now. They have taken x rays did an automatic blood count test ( 2times once in may of 05 and once last week) and thyroid tests, and everything has came back normal.

I have tried acupunture, accupressure, massage therepy, hot and cold presses, pain killers, nsaids, advil, trazadone, nortrptilin, and went to a chiropractor. Nothing has helped at all. Even hard core pain killers did not lessen my pain an iota. My doctor just sent me a letter, stating that he could not fins anything wrong, and that he wants me to try physical therepy, again... I am so frusterated, and I am in so much pain it has effected my life to much already. I no longer have a social life, becuase I found it to difficult to pretend I am okay when I am not. The pain when I breath is sometimes so painful that I actaully gasp out load,and then people want to know what swrong ect.. And I don't want to talk about it, becuase I don't know what it is, and I don't want anyones pity. Anyways, I am afraid there might be something really wrong with me, I often feel feverish but when I take my temp its always betewwn 96.2 and 97.6, which is low. I can't remeber anymore what it feels like to feel good. If any has any suggestions please post, I am so very desperate, I don't know how much longer I can go through every day with this pain, every single time I breath. I can't just stop breathing, although its starting to seem like the only answer