I was pregnant 3 months ago and miscarried at 6 weeks. its been about a month or two and my period was supposed to be a week ago. this morning i had severe pain and bleeding and found a small white piece of tissues when i wiped. it was about the size of a grain of rice. the pain has stopped now, its been about 3 or 4 hours since the pain began and the bleeding has slowed as well. was the tissue from my last pregnancy or was i pregnant and just miscarried again? what is going on?