On the pill for 17 years, now stopped and wanting a baby

Hi all, I'm Tracy and I'm 33. I started on the contraceptive pill when I was 16 and have always been on the same one, Microgynon 30. My husband and I now want to try for our first baby. I stopped the pill last week, but friends have told me it could take months to flush it out of my system and for my periods return to what's considered 'natural' ones. Is that right? Any stories similar to mine which I can learn from would be gratefully received. Cheers.