My Tinder Hookup and feeling nauseated the morning after..

Last night, I went to hook up with this guy that I met off Tinder.. yes, Tinder, go ahead and judge. We parked somewhere dark and somewhat secluded (yes, we were in a car) and we just talked until he started to touch me. Things get a little heated and I ask if he has a condom. He said no and I told him I did. (Always be prepared ladies!) So I put it on for him and we start going at it. He adjusted himself a couple times and I think he took the condom off during the process and positioning himself. A little sidenote, he wasn’t exactly inside of me. He was just rubbing himself between my lips and against my clit. He probably did that because he didn’t have a condom but still just because he didn’t put it in, he should’ve left the condom on. He finished I believe and then we start getting dressed. I take him home and I drive back to my college campus to talk to my friend and then go to the bathroom. I was a little wet down there because I didn’t really get off. So I was scared that he took the condom off and didn’t let me know. Now the morning after, I am feeling a little nauseated. Maybe it was just my nerves but just to be safe, should I get a plan B pill? I know he didn’t put it in but I mean just to make myself feel better, should I?