Please help

Hey, everyone, I’m sure there aren’t many guys around here. But I figured this would be better than asking reddit. Because you know... reddit. Anyways, four days before her expected fertile window we used the withdrawal method. I feel like I had done as much as I could to make it “perfect”(urinating before hand, pulling out before I got the urge, etc.). On top of the fact that she is usually quite irregular she is 3 days late. The thing, is she has had ZERO pregnancy symptoms and ZERO PMS symptoms. She has been extraordinarily stressed and emotionally fragile since I left for college two months ago and this past month has been by far the hardest on her. Any guidance will be appreciated.