I am still a virgin. I have been fingered and had oral sex performed on me before, though, but with no problems. This weekend I allowed a boy to finger me, nothing was unusual or painful. The next day I started my period and when I tried to put a tampon in, I couldn't. It was like something was blocking my vagina. I could only get the very tip of the tampon in before it was too painful to persist. I wore a pad instead, and tried later only to have the same thing happen. I've now been on my period for two days and still cannot put in a tampon. My vagina is noticeably swollen (just the actual vagina, not the lips or anything), and while not exceptionally painful it is very uncomfortable and seems to be getting worse.
Whats wrong?