no period// pregnancy??

i am on the BC brand Slynd. in this bc there are only three days of placebo pills. this is my second pack and i’ve taken every pill at the exact same time (9 pm) perfectly since i started the first pack. last month my period came before my placebo pills and my bleeding lasted a week so i think it was breakthrough and then my period but idrk because it was heavy and lasted like a normal period. this month however i took my second placebo pill last night and when i woke up this morning my period has yet to arrive. i’ve taken two pregnancy tests, one on Wed and Fri morning of this week and both were negative. i have had protected and unprotected sex this month. my tests say i’m not pregant and i have been having cramps, i’m just not sure if my period will come bc i’ve seen post where ppl say their period didn’t come at all on Slynd.