When to start my pill pack

Libby
I have been off my birth control for a month because of some prescription things.. I started my period today, 3 or 4 earlier then I normally would (25 days after the start of my last one); should I start my pill pack tomorrow, Sunday, being that I would normally start it the Sunday after my start or should I start it 7 days from now since the Sunday following my normal cycle would be then (and really that’s what I would normally do)?
THANKS