I am extremely Worried and paranoid that I could possibly be pregnant. We were conplty clothed the entire time. I am 18 and I was sitting on my boyfriends lap when things started to heat up, and I noticed that his pants were slightly wet along with a small stain on my running shorts, which only have thin built in underwear. He was wearing gym shorts and boxers. I finished my period about 2 days ago. Anything to put me at ease would be greatly appreciated. I'm not sure if he came it would just pre ejaculation.