Hello, I am 20 yr old boy.. One month back when i used to wake up i used time feel stiffness in my left hand small finger.. But ignored it.. Then after some days the stiffness became all day long .. after few days the pain started in both knees and hip and groin area and neck ... the i went to a doctor for check up he told me to have rheumatoid factor test, Cbc test, Cre protein test and uric acid test... but it all came as negative .. then after few days the pain started in muscles too of left leg... Joints of shoulders also became little painful and poping sounds started coming from different joints... Whats this..? Pls someone help..?