Pregnancy

I don't know if I'm pregnant or just late
My period is now 6 days late and the day I was supposed to start I didn't so that night around 3am I fooled around and now I'm worried! Even though he didn't ejaculate inside I'm worried about pre-cum. My periods usually start when they want to sometimes they're at the beginning of the month for a certain amount of time then they change to the end then the middle. So idk if I'm late because of that or pregnancy!!! 😰