late period?

hey girls! so my period is late by about four days now. i’m usually never really late and if i am it’s for about a day or two. i have been getting on and off cramping for the past few days where it feels like i’m going to start and then it just goes away? i have been stressed lately though. my boyfriend and i have had sex quite a few times since my last period but every time we used a condom and made sure there was no leakage or holes. i feel like i’m kind of freaking myself out here? what do you think?