Stopping birth control

Ch

I stopped my birth control pill last monday. And started on a prenatal vitamin.

Ever since, I have had the darkest, and thickest -period- and I can go through 3 or 4 -overnight pads- a day.

I also started this after I finished my pack of pills. So I had already had my period and then didnt for 2 days, then this.

I know you usually bleed after stopping the pill because of hormones. But I've never had it like this. It's been a week and I see no sign of it calming itself down.

I am also very very nauseous and idk if it's a sign of starting one and stopping the other or not.

How much longer will this keep going and will I still end up having a period this month too?

Will I be nauseated the whole time I'm taking me prenatal?