am I pregnant? help please!

So I started taking 28 pill birth control 2 years ago. I stoped taking it for the last 3 months but then started again 7 days ago but only took 3 pills and stopped because I was supposed to start my period. My period is now 3 days late and I’m freaking out. Is it because I took 3 pills that my period is messed up? I’ve stopped taking my pills hoping to start my period but i’m really freaking out so someone please help.