Ok, so about a week ago me and my girlfriend were fooling around and I(Being a complete id**t) stuck it in, but just a couple in and outs. Me and her are so freaking out about this, even tho it is precum! About 18 hours later I got her Plan B. She immediately took it. Her period was suppose to be in this week but she still hasn't gotten it! ughhh Could she be pregnant? What are the chances?