first period

Hello everyone! When did you get your first period after delivery? Im at my 9th week pp. I woke up to find that i am bleeding. I think its my first period.. if it is my period, it could explain the horrible cramps ive been feeling some days before.. However me and my husband had intercourse 2 days ago and he released inside me by accident. So im a little paranoid if it might be pregnancy spotting instead (though it might be too soon for that hahahah) will continue to monitor though.