I had joint and probably tendon pain for 3 months (cannot grab things, everything hurts, sleeping on shoulder hurts, my muscles all gone, stiff in wrist and elbow, cannot run, walk, exercise as joints hurt) and at first thought it could be arthritis but I tested negative for rheumatoid factor and all and doctor said it wasn't autoimmune problem. If I am negative for rheumatoid arthritis, does that mean I don't have arthritis at all or I could have a different type of arthritis like osteoarthritis etc. Also, I was given arcoxia before test results that said was for joint pain and arthritis and it did made my joints feel better the day after consuming it, no knee, shoulder, wrist, elbow pain (maybe still a little but not as usual). If the arcoxia pills were effective then does that mean I have arthritis or tendonitis? Also they said could be because of stress and anxiety depression that I have unexplainable pains and I do feel a little stressed and anxious these days with depressive thoughts, so could be because my neurotransmitters are low but I am not sure and haven't gone to psychiatrist that doctor recommended cause I was too young for arthritis he said (19yo) so he suspected other things as my test results were also negative saying I am fine. Please, I need explanation before my body dysfunctions and falls apart and then doctors come and notice, I cannot image not being able to use my body.