Bleeding after Sec

So me and my boyfriend were having unprotected sex (don't judge) and he went to pull out but I don't know if it was in time. When I was cleaning up afterwards I had blood on the rag. I am due for my period any day now but after that one instance of blood I didn't bleed at all for the rest of the day. I'm freaking out because I don't know if that means that I was at a fertile time of my cycle. Please someone give me peace of mind 🙏🏻