Can I be pregnant

IvyRose • Mommy of 3💙💙💙#babyboys Ariel ,Axel and my newborn Abram

I'm having mild abdominal pain and my period is 10 days past due I also had unprotexted sex but I did take the Ella pill 3 days after the tested me before the proscribed it to me and I came out negative could the pill delay my period ??? I'm just to the point where I'm stressing out and can't sleep :(