Take a pregnancy test or go to the doctor for a blood test. but wait until you miss your period. I am almost 58 and been married 43 yrs, have two children and 6 grandchildren, I love them all very much.
BUT if you don't want any children right now then don't have unprotected sex. or have no sex at all, those are the only ways I know not to get pregnant.
don't know your age but if you don't want any children then weigh things out. think before you act, and don't let him talk you into anything...
make sure he uses a condom.
If you only had sex 2 nights ago then you're now out of the window for being able to take emergecy contraception. All you can do now, is wait.
You'll need to wait and see if your next period arrived. If not, then take a pregnancy test.