Any insights?

Lee • Mommy to 3 year old girl! Baby #2 joining us March 2016!!!
So I've been off BC for 4 months now. First cycles were around 28 days last one was 40 days. Glow and FF said AF was due CD 32-33 this month. One instance of spotting on CD 33. BFN on CD 35. I temp but didn't show a clear ovulation pattern this cycle (sick toddler so not sleeping through the night during fertile week) possible ovulation between CD 18-20.
​Any insights???