help!

i just started birth control a few weeks ago and i had unprotected sex with my boyfriend during the first 7 days that i started it. he pulled out like 10 seconds before he came (so that means he did not cum inside me). now i’m almost done with my second week and two nights ago i woke up around 3am and felt nauseous and then threw up. today out of nowhere i just got really nauseous and i’m trying not to throw up while i’m in the car. i’m also on vacation. i’m really worried and i don’t know what to do.