Pain and discomfort in various joints.

Hi doctors, It all started 2 months back i wake up with stiffness or locked(very little bit) Then after 5 days i started feeling pain in my neck and left upper shoulder as well. And after 3 days the discomfort and pain went to hips, groin and knees as well. Then i ran to a doctor he advised me to get a xray ray done of knees, Crp blood test, Rheumatoid factor test( Which came negative) , Cbc, Uric acid test, vitamin d test Which all came as normal . Then I started taking 60k vapsules of vit cal and neurokond lc... The severity of pain was gone but pain was still there. Then, Today again from 10 days the left shoulder, Neck area left, Left knee are hurting and i am feeling depressed. And i have taken all medicines but the pain is and discomfort is still there. Someone please help!!! I am not financially stable and i earn and study ... it would be very great if someone pls reads my query and help me ! I beg someone pls help!