Stopped taking the pill

Hi everyone I'm just wondering about your experiences when you stopped taking the contraceptive pill.
I have been on the pill cerazette for approximately 5 years, I did however get caught pregnant whilst on it & after I had my baby I carried on taking it. My partner & I are considering another child so we both decided I should stop taking it to try & get my body back to normal & see if my periods regulate. On this pill you don't stop taking it every month so therefore don't have a period. Anyway I took my last pill 19 days ago & still haven't had any signs of a period yet. Is this normal? How long does it take & what are your experiences? I'm just getting a little worried.
Thanks in advance