Is it possible that i miscarried and didn't know it?

Yes: It is very possible. If you feel that a miscarriage has occurred, it is best to contact your provider as soon as possible. If you are having persistent bleeding, you should consider seeking more immediate medical attention.

Yes: If a miscarriage occurs very early in pregnancy, it may appear to be a longer, crampier and heavier menstruation than usual, especially if you are a few weeks late.