Urgent help

I usually take my pill within 1 hour sometimes I’m like a hour & half late but , I’ve been on it for about a year & This is my first time doing this. So I got my period on the 2nd sugar pill , today and I always get it on the 3rd/4th. My “period “ is so light that you basically can only see it when you whipe , and I’m scared about that , I also had sex with my bf today , could I be pregnant ? I’m so scared idk what’s going on.