Hi, I had my son in June this year and since then ive had 3 periods. All have occured every 23 days. I am now on day 26 and for the past week have had fatigue and increased urination. Both of these symptoms I experienced early in my last pregnancy. My normal cycle length before pregnancy was 25 days. My husband and I had unprotected sex on day 9 which would have been right around ovulation. I took a pregnancy test but it was negative. Is it simply because my hormones are still trying to return back to normal and my cycle lengths will vary from month to month or could I still be pregnant? Anyone experienced irregular periods after pregnancy?

P.S - I had to stop breastfeeding after 4 weeks. My period returned weeks after my baby was born.