Bleeding After sex (not rough)

Nikki

Hello ladies I am freaking out had sex last night and started bleeding had a small clot when to the er and they said there was no bleeds and baby in placenta while I was at er bleeding went to very small spotting. Then this Morning/Afternoon blood is going into the toilet I am not filling up a pad not even a half of pad I am not cramping I believe it's going to be a miscarriage has anyone experience this