Hi Doctor, I Am 28 Yrs Old Women , I

Hi doctor, i am 28 yrs old women , i have one kids of age 21/2 yrs old, recently i started to diet and do excercise extensively of about 1 hr daily and burn 500 calorie a day, usually i ll get 6 days of periods and before my delivery i had stomach and leg pain. last 2 months my period was only about 4 days and sometime flow is not proper and when wipe itin the tissue i get some dirty bloody stuff and my weight is not getting reduced and also it get increase every month (i have hypothyroidism but my flow was affected by it before)