Y can't I get pregnant?! ?

Kristyn • Married to a very entertaining guy! We have a puppy named Dolce and a baby due in jan
This is our first time TTC and we've had no luck. I've been off OCPs for about 10 months and actively tracking menstrual cycles and fertile days for about 5 months. I was hoping so much for this cycle...It Would've been a perfect holiday gift to surprise my family w baby news. I've taken 3 tests last week.. All negative, period due tomorrow, we'll see If it comes or not. My menstrual cycles have been super irregular though  -- any ideas or experiences why the irregularity and lack of success?! Each negative test feels like a mini failure -- and I'm a type A go-getter, "there's nothing I can't do" kind of person -- this is killing me!