Period advice please x

Hi everyone I’m just wondering when to go off when my next period is due as I had a period the 16th to the 19th of November then I stopped the pill and had a withdrawal bleed 28th of November to the 1st of December

If I was to go off the 16th-19th I am 2 days late

But I’m unsure on how it works now?x

Advice would be great x