Scared

i'm sorry i know a bunch of people hate these questions because there are so many of them but i just need opinions, i'm on the pill and i'm 3 days late. my bf and i have sex with no condom and he's always pulled out. i've missed one pill, but i've always taken my pill on time or only a few minutes after my time. i've been worrying like crazy and i don't know how to calm myself down. i will be taking a test either tomorrow or when i'm 5 days late. should i be worrying so much or am i just stressing myself out for?