Me and my girlfriend took a shower about three weeks ago and we ended up doing some stuff (not sex) but some of my sperm got in the water (there was about 2-3 inches) and she was sitting in the water. She was only in the water for like 2 minutes and she was at least 4 feet away. Now her period is 3 days late and we're woried she's preganant! Is this likely?!? Please help asap.