Why am i late? 🙃

Why am I late if I haven’t had sex......we’ve been snowed in at my house for a week, and I’m in Arkansas so that’s never happened I usually have a crazy busy schedule so that’s been a change? Could that be it? Currently on cd 30, which sometimes I start then but I still haven’t and I’m just worried. Boobs hurt like heck hahah which they always do right before my period