Last weekend, me & my boyfriend had sex for the time time together. I've had sex before & so has he. We were both really drunk but I know he used a condom & I don't remember if he cummed are not bc I don't remember how long it lasted. (Yes, I was pretty messed up but it was still great) anyway, we had sex Saturday night & I was suppose to start my period two days ago (Tuesday) but I haven't. I take the pill everyday & I haven't missed a day but I am really stressed about ending the school year & some other things. Can my period be delayed from stress or should I be more concerned?