I had my first pp period 30 days ago at 11 months pp. It was totally normal, bled for 5 days and I even felt like I maybe ovulated 2 weeks after my period (had ewcm, rise in libido, etc). Now I'm currently 2 days late with no indication AF will show soon. I took a cheap pregnancy test in the middle of the day (watery pee) and it was negative. Also I'm not trying for a baby, I'm using the same birth control method I've been using for the past 10 years.

My girl is breastfeeding more the past 2 weeks. Do you think that is causing the delay my second period?