Want to give up!

Kathryn • Hello everyone, my name is Kathryn and my fiancé and I are trying for baby number 2. We have a 4 year old daughter
I am struggling bad today! I'm 9 DPO and I know I'm not out of the game till AF shoes up which should be the 14th or 15th but I tested this morning when I shouldn't have and it's got me down and I just hate hate this TWW all I want to do is cry. 
Also ladies I need advice? Glow for some reason says I'm due the 12th this month which puts me at 26 days. My other apps say 15th? I've always been 28 day cycle. Which should I go by?