How do you know when your period will come

Hayley

Silly question.. after a miscarriage when your levels hit zero or “below pregnancy”. How does your body know to kick in your period? Is it random? Does it kinda go off your cycle before you were pregnant? I usually have regular periods.

My levels on Friday were 10 so hopefully today all hormones are gone. It doesn’t seem like it though so maybe they are lingering around..