Pain in joints, lower back. Ok or not!

I had C section delivery in Feb,16. Since then I feel like exhausted all the time, pain in my body especially in joints and lower back and sometimes headache also. My stitches also started paining but not severe. Now my stitches are OK but sometimes I feel pain in one of my stitches. I also had allergy in my legs , kind of pock and it left its marks on my legs which looks very ugly. I also feel depressed because of my body pain. I am taking dasmularist, cipcal 500 calcium tablets and faa20 iron tablets as suggested by my gyno. My questions are: 1. How can I reduce my body pain- is it related to my eating and sleeping schedule and also diet 2. What to do to remove pock marks on my legs 3. How to check whether my stitches are OK or not