Unprotected sex

So me and my fiancé had sex last night (it was amazing) and today in the morning I realized that I forgot to take my birth control for yesterday when I was taking the one for today . I’m honestly freaking out . He has explained to me that everything is going to be fine but I’m panicking . How many days should I wait before taking a pregnancy test ???!!!! (I have 20 days till my next period ) . #someonehelp I’ve never been in this situation before and don’t have anyone close to talk to about it . (Woman advice)