I had unprotected sex with my girlfriend a day before her period is expected to start. I made sure to withdraw out before ejaculation and I ejaculated over her panties. Now my doubt is that I'm a lot worried about whether there was any sperm in my pre cum because i had pee-ed before having sex. Secondly since she was wet, by any means the sperm over her panties could travel inside her. Thirdly I'm worried if she would get pregnant at all because it was just a day before her expected period. And should she consume emergency contraceptive pills??