pregnancy?

okay guys I am really not sure about the whole pregnancy thing, like I had sex (first time) 2 days ago and we were using a condom (I don't think it broke but it was kinda dark and I just didn't look whether it was broken or not) and because I was so frightened to get pregnant, I bought the plan B pill (the cheaper version which delays the ovulation by 3 days and not by 5 like the normal version does) and I am having my fertile days at the moment so I'm kinda curious if there is a chance of me getting pregnant or not? like is it possible even though we used a condom & plan B? it said that there is a 7% chance for me to get pregnant when we were having sex and I'm just feeling so stressed and I'm afraid of getting pregnant (and sorry for my english, it's not my first language)