[JessJ]

Some women still get their periods or some bleeding even while they're pregnant. It's actually fairly common. That being said, though, from what you've described, I seriously doubt that she is pregnant by what you did. If I were you, I'd be more concerned about what you did and doing whatever you have to to never allow it to happen again. Doing things like this could be very damaging to your relationship with your sister. Such things cross a line that should NEVER be crossed with people you're related to. I would stop worrying about whether she's pregnant and be more concerned about getting the help you desperately need.