Missed one birth control pill this month?

Because of some pharmacy complications, I got my birth control pack late in July. I always start my packs on Sunday, so this meant I took my missed pill as soon as I got my pack on Monday, then my usual one for Monday at my usual time.

Since being in the birth control Mylan, I tend to start my period on Saturday or Sunday at the end or very beginning of a pack. No period so far.

I have NEVER missed pills. I’m so afraid. I feel this terror every single month around this time. Can anyone provide reassurance, or can anyone relate?

Thanks so much for reading!