Just a quick question, can someone sexually experienced answer

I've had sex for almost 4 years now, so it's not like my first time lol.. But this never happened before or maybe I didn't pay attention to it??

So here's the thing. Me and my man had pretty intense sex for like 2hrs straight, switching from fingering to normal penetration few times and i feel like my vaginal opening is a bit swollen especially the lips on the sides look kind of full? Is this normal? It's not hurting or anything. We didn't use a condom so it's not irritation. But I've never had sex for this long straight. Plus I'm on my period if that changes something. I'm 19