I was nursing my 9-month old full time and taking the mini pill. I had not menstruated yet and I got pregnant with my second. I was 9 weeks pregnant when I realized it - I had gotten a stomach bug; after being nauseous several days after the bug had passed, I realized something was up! My husband didn't even believe me when I told him I was pregnant. Anyway, if you seriously do not want to get pregnant, I would take precautions. Oh, by the way, you have to take the mini pill at the same time every day; and don't drop one in your car and think it's no big deal to skip it : ) I want to have another baby; but until then, I had an IUD put it. I found it to be the best thing for me.