For the last 2 years I have always come on my AF 15DPO (i'm not sure how as I can always vary with when I come on!
) my last period was the 3rd January, so according to my app I ovulated around the 20th. My DF and I dtd within 72 hours of ovulation.. before, on the day, and the day after.
I'm currently 4 days late (19DPO) and I have been having intermittent cramps which feel like period cramps (quite strong at some points), sore boobs, tiredness, slight nausea, back ache, feeling wetness down below (TMI.. sorry!) and a bit of a metallic taste in my mouth for the last 10 days.. but when I took a test it was a BFN. Nothing has affected me otherwise i.e stress, gain/lost weight etc so at this point I'm baffled.
We have been TTC for the last 4-5 months and I feel at this point I may just be getting my hopes up and I'm not pregnant.. I'm simply just hoping that I am! 
Does anyone have any advice? success stories? just anything lol? I feel like I am driving myself insane because I want it so bad!