uhmmm is this normal?

So me and my SO have had sex a good handful of times since i had my little one 3 months ago. but this time, In the middle of it out of no where i was BLEEDING. and i say bleeding like that because it was like heavy, just sneezed while on my period like blood. At first i was like wtf, then i was like okay maybe it’s my period. so i put on a pad and go to sleep. next morning, pad was convincing me it was still my period at this point, so i switch it out. Next time i go to the bathroom, there’s nothing? All of a sudden i stopped. not a drop. nothing. I’m back at wtf. help