Chronic Joint Pain?

[dani4banani]

I was hoping someone would have any potential explanation as to why I have been suffering from joint pain since I was about 13. I am 23 now, and the pain is more prevalent. Arthritis and lupus have been ruled out from testing. My only symptom is joint pain in my ankles, knees, hips, wrists, and elbows, that lasts anywhere from minutes to months. No rash, stiffness, or swelling. I can best describe it as a sharp, stabbing pain, that worsens when standing on or flexing the joint, and comes on without warning. It can be so debilitating at times that I can't put any pressure on the joint that is hurting, which can leave me unable to walk until the pain subsides. It is beyond painful and frustrating, and I would love to hear any ideas or suggestions.