Should I️ be concerned??

Chelsea

So I️ stopped taking my birth control 3 weeks ago and I️ still haven’t had a period. Is that normal? I️ feel like by now I️ should have had a period. I️ have a doc appt in 1 week, then I️ will know what’s taking so long, but in the mean time I’m concerned. I️ don’t feel like I’m pregnant either, I️ have a boy and a girl and with both pregnancies I️ was very very sick from day one. Any advise????