What CAN IT BE?!

Haneen • 18, married.:)
Hey everyone! So recently me and my husband experienced something so embarrassing and weird, We had sex and afterwords when I was wiping there was like pinkish redish on my napkin, I still don't know what it was I smelled it & It did not smell like blood Nor Period blood. Also I'm 15 DAYS LATE! What can it be?! Please help