Birth control and late period?

I've been on it for a few months now and has kept my period suuuper regular until now.

I did accidentally miss two days around ovulation time and we did have sex, but I took a cheap pregnancy test this morning and it was negative.

Im on day three of the placebo pills so it's three days late now.

Still no sign of period which is really unusual. Anyone else have this problem or ideas what's up??

Maybe it'll all come out while I sleep tonight 🙄?