Pregnant or not?

Me and my bf were dry humping and he cummed on my underwear by mistake. The underwear was the only barrier between the cum and my vagina. It wasn't that wet. I went and cleaned my vagina within 10 mins. And also I got my period the next day. It was normal. Lasted for 4 days. This month I kinda got a yeast infection and breasts are a bit tender ( They get sore during my PMS which is along this time) I'm so scared. What is the possibility of me being pregnant?

Wait until your next period is due. If you miss your period take a pregnancy test. Otherwise don't worry. 

Very unlikely, unless he was inside you it'll be pretty hard to get pregnant