Please don't be rude… I need serious answers

I had sex yesterday and the guy came on my stomach/pelvis area and I forgot that he did and he rubbed the outside of my vagina or my labia. Some of his sperm got on my leg but it dried up. I just wanna know what my chances of pregnancy is? And if I should take plan b. I took plan b two weeks ago as well. We used a condom in the beginning then stopped I started my birth control yesterday as well. Im worried about my chances. I'm 23 years old so don't think I'm 15,16,17 yrs old. If you're going to judge and be rude keep your comments to yourself. I'm looking for serious answers only because I'm already stressing i know stress will make everything worse.