I recently had sex for the first time, and there was some discomfort, but it wasn't too bad. While we were having sex, though, I felt my vagina stretching and then almost like there was a tear. This was one week ago, and ever since, I've been bleeding slightly. It's not as much blood as I would have while on my period, but it's enough that I need to wear a pad every day. It got better for a while, but then last night I masturbated using spray from a shower head (not inside my vagina) and it's gotten worse since. Is this something that will heal on its own or should I be worried?