I had my first baby February 12, 2016

I had my first baby February 12, 2016. My husband and I want our kids close together in age so we started trying again immediately. I breastfed from day one and am still breastfeeding my almost 17 month old. I didn't get my period back for 8 months after giving birth. So that put a hold on conceiving. But after I got my period back we started trying again and using a couple different apps. My cycle is an average of 40 days and the apps couldn't really keep up with my irregular cycle. So as soon as I sort of gave up on the apps I got my BFP.