I started bleeding the day I was due my period. I didn't think I was pregnant. Day 3 the bleeding got very heavy and I passed a big clot and what looked like a pale sack too. I've had a lot of pain and feel sick. Today is day 4 and I am still bleeding heavily. (SUPER PLUS TAMPONS EVEEY 2 HOURS). I am on blood thinners so I shouldn't have clots. Please help