Good afternoon! I m pretty healthy 42 yrs old women. I m having some joint pain on my fingers and knees. My PCP order CRP, Rheumatoid factor and sed rate, all came back negative. the joint pain is not as severe at the moment but what it got me worry is my whole right arm starting from my shoulder to my fingers get weak, can type on the computer or write anything because I don t have strength. I can t even type or hold my cell phone. It gets me very fatigue. I have to use my other arm to move my right hand around, it can last a whole day or several hours. Please any advice? thanks, Maribel