The pill may have just altered your period this month.
Plan B (emergency contraceptive pill) can often mess up your period. Taking the emergency pill is like taking a bunch of birth control pills all at once and it messes with your hormones so that's probably what is going on right now.
I think it's the pill but you should make sure and bring your concerns up with your doctor at your appointment.
i think u shud go the doctor i read the same symptoms ur having i dont want to alarm u but it cud be an incomplete miscarraige i had a similar problem and went to my doc she told me if i happened to be pregnant wile i took the morning after pill then i wud get alot of dark blood flow and cramps and tissue discending from the vagina it cud be ur cycle being interuppted but i tink u shud go the doc or get an ultrasound to find out for certain hope this helps
I would go to the DR and get it checked out…I had a m/c in early April and it was a lot of dark blood and stringy like….I didn't have at the grayish tissue because I was only gestational 2 weeks and the baby never attached into my uterine wall but I think that the only way to know for sure is to go and get a check up, if it is an incomplete m/c you are prone to infections