A few days ago I had protected sex with my boyfriend, which was not the first time for either of us. But one of the times he went in, it felt tighter than before, and it hurt a little as if I was slightly torn. Which cause a bit of bleeding, but then became slightly itchy the next day or so, and when I looked down today, the piece of skin was completely torn at one end. Now the peice of skin hangs there from the other side. Will it go away on its own, or does it need to be cut off?