Teen FAQ

I have a white thick substance in my vagina that is almost "blocking" the way to my womb. It's not just discharge(I have that too), it's really a thick white-transparent mass. I can't use tampons because this thick mass is in the way and it hurts whenever I try to push, which means it would also hurt if I would have sexual interference with someone. And if I'm not able to insert a tampon, how will I ever be able to have sexual interference with someone? I think I might have caused it myself; I was with one of my girlfriends and we did things we were not really supposed to do. Maybe it's got nothing to do with what happened when I was with my friend, but I just got a feeling it's connected to that. (We took a pen and inserted it into my vagina but it got stuck someway, and we were not able to get it out again. I pulled pretty hard and when it finally got out of my vagina, I saw that the pen had a little white, transparent tissue and I started bleeding a little and after that my 'blood' started having a brownish color. I had never had my period before, so I'm pretty sure it wasn't my period. It's been a few years now since that happened (I'm 16 now) and I'm still not able to use tampons. I'm extremely worried, but I've never been to a doctor before and I've never talked to anyone about it. I don't even think my friend remembers what happened, but it's really difficult for me to just forget about it. I just want to be able to use tampons and to have children one day. Is that white transparent mass that is basically "blocking" the way normal, am I overreacting or isn't it normal? Do some women have this white mass too? Can you please help me? It's a very embarrassing subject for me to talk about. Thank you.