Ever since I first got my period at 14, I have sometimes have problems with tampons seeming to get 'caught' in my vagina. I have figured out that there's a cord-like piece of flesh that stretches across my vagina that the tampon gets stuck on. I am not a virgin, and my hymen definitely broke the first time I had intercourse (there was a lot of blood) but I still occasionally have this problem. It's extremely painful and I have no idea what the 'cord' is or how to get rid of it.
I also have a second question: Sometimes when I have sex, there seems to be a wall in my vagina that blocks the penis from going very deep, and I can feel a strong and painful pressure. This doesn't always happen, but that could just be that I get too caught up to notice or penetration is at a different angle. Is this normal? What's going on?