Effectiveness of the pill πŸ˜•

So I had unprotected sex with my boyfriend back on Tuesday last week and I started to feel kinda nauseated and I had some tummy cramps and I'm feeling kinda anxious cuz idk if I'm pmsing, I caught my boyfriends stomach flu (he was sick with some of the similar symptoms)Β or I could be showing early signs that in pregnant πŸ™ I've been taking birth control since I was 18 (now I'm 23) and I also taken my pill about 10 minutes late the day before I met my boyfriend yes I know this sounds like a stupid question but I also don't have unprotected sex very Β oftenΒ