What Causes Pain All Over Body Causing Difficulty In Walking?

hi...i had a viral fever with cold and chest congestion in august 2009. After a week, i had severe pain in the lower part of my body, hips down for 3 days and i was bed-ridden. After that, I had pain walking for 2-3 weeks. Then, I was fine. Again in March 2010, i had severe pain in my entire body for 3 days. My ESR was 55. RA and CRP was normal. After that, i am having difficulty walking with pain in my legs and sometimes in my hands. I did a lot of physiotheraphy. nothing helped. December 2010, I went to a ortho clinic, my ESR was 23, my CRP 9.3, but RA was normal. Doctor has given me Sazo500 twice a day. Still I am feeling no improvement. The doc told me i had pain in several points in my body, starting with shoulder,sides of ribs, hips, pelvis etc. what is this condition. i am 32 years Female with two small children.