hi there, i have couple of issues about my periods i have my thyroid its hypo and i was having irregular periods and it chenaged last 8 months it was regular and suddenly last month my thyroid had been increased , so i got my late periods that means after 7 days of my regular date.(that meansregular date was every month 10th,last month it was 17th) .but this month on 10th i got dark brown discharges started and it last for 10 days.i have cramps in my uterus, i am worried about this.