Sore near the opening of vagina burst during sex.

So I start dating a guy 5 months ago. Last night we were having sex (unprotected) & it felt a little sore. Half way through I felt a pop sensation then there was a small amount of blood. I’ve located the “sore” now which is near the opening of my Vagina, (I didn’t know it was there). What could this be & is it bad that it burst during unprotected sex I’m so worried!!!

Could you share some pictures please? Should you not know how to share files, see the attachment below.  👇