what's going on with my body?!

Lacey
So I had sex with my boyfriend on Sunday (during my fertile window) and I had some random bleeding the last couple days. AF not due for another 12 days. I don't get it. Super bloated too. 
I know no one on here can tell me exactly, I just like feedback and putting my stories out there so other people don't have to feel like they're alone. 
Thanks for any responses! ❤