Misssed pill!

I have been having unprotected sex with my fiancé for the past few months and have been taking the pill for about 4 months I forgot to take one yesterday and am in my fertile window, the highest chances being today and yesterday. We have sex almost every day including last night. I'm worried the pills might not work, I took the missed one as soon as I remembered this morning. Anyone have any thoughts on this? Should I be worried? I am freaking out about the fact that I don't want to have kids before marriage.. 😞