Could I be pregnant or over reacting?

Stephanie
So me and my boyfriend were having sex. He came out side of me and ended up touching his sperm. He washed his hands a couple minutes after. (I want to say about 15 mins) My boyfriend wanted to pleasure me so I can finish and he also fingered me after he washed his fingers. Is it possible that I could get pregnant? What do you girls think. We cleaned most of the sperm with a towel and he used a clean towel after he washed his hands. We were thinking about getting plan B. Please no rude comments. I'm only asking for advice. Thank you in advance.