What Causes Lower Back Pain And Tingling Sensation In Arm?

I have swelling numbness pain in my hands all day but its worse when I sleep..I wake up n my whole lower arm is weak and tingling.. I also have lower back pain and pelvi pain... knee pain and shoulder pain... pain in my right back shoulder blade when I lay down.. really fustrated... I've been seeing dr for over two yrs n they can't seem to find wats wrong...