I have an 11 month old, I am still nursing him. I had my very first period after childbirth last month (June). Before pregnancy I had normal 28 day cycles. So I expected my next period to start 4 days ago. No period. I took a pregnancy test and it came back negative. I'm just wondering if it's normal to have irregular periods while I'm still nursing, and if it's normal to skip a month? Could I be pregnant and just not have enough hormone to tell yet?