Has this happened to anyone else? (TMI)

So this may not be the best board for this, but I didn't feel comfortable asking anyone I knew... I had sex for the first time in a while (like a couple months, maybe). It was with someone I've been with multiple times before. Anyway... afterwards, I used the restroom and there was a little pink when I wiped. It was a little odd considering we weren't at all rough, pretty vanilla for the two of us, actually, but I shrugged it off as no big deal and cleaned myself up and got dressed. Well less than 5 minutes later, I knew I needed to clean up again, if you know what I mean, and when I went, there was a HUGE blood stain. Like if a tampon leaked ALL DAY LONG. even had a few clots... It was like I was on my period. I cleaned up, changed and put a panty liner on just in case, but after that, nothing major... jist the little bit of pink when wiping. Nothing like this has ever happened to me... Not even when I lost my virginity. Lol. And it's not like I was with someone much larger than anyone else I had ever been with bc I've been with this person quite a bit. I'm just wondering if anyone else has experienced something like this, if it's normal, or if I need to make a Dr appointment.