No period on the pill?

Natasha • Mother to 2 beautiful girls 🥰💖

So I’m on the 24 day pill and I’ve been on it for 4 months now and always start a period within a day or two of the placebo or just not taking it and starting a new pack 4 days later. But this month I never had a period. I took a pregnancy test 2 days ago and it was negative. Today I’m supposed to start a new month of pills, do I just go ahead and start it or wait for my period? Why don’t I have my period? Help please!!