Even if you didn't know the doctor will do a blood pregnancy test to see what Hcg levels are. If you are in a miscarriage your levels should still be enough to say for sure you were pregnant or not. You do definitely need to go to the emergency room and get checked out because if you did miscarry there are things you will need to do like follow up with the doc and make sure levels go back to zero. Also making sure there is no tissue left behind is important no matter how far you might have been. If you were not pregnant you should still have that checked out. You should have your blood tested ASAP since levels can drop really fast and then they might not be able to say whether you were pregnant.
I didn't no I was pregnant that's the think /: will they beable to do anything?
You need to go to the emergency room asap
i would go to the emergancy room asap to get checked out any heavey bleeding isnt good when your pregnant gud luck hope all ok