I don't remember if I had a tampon in when my boyfriend and I had sex. He has a very large penis. Could he have pushed it into my cervix? And what does the cervix feel like because I had my finger in there so far I could feel something that kind of felt like the bottom of a tampon. But my boyfriend said that was my cervix.. please help asap I'm getting sore from digging for this tampon that is or isn't there..?

Please stop digging around or you are going to end up with an infection. Your doctor will be able to figure out what is going on. Or go to a walk-in clinic.