Af late bfn

Tanya
Af was due on Wednesday July 13. Had brown spotting on the 10th and 11th then again on the 15th did a test this afternoon and bfn. Idk what to think. I have swollen sore breasts, nausea, heartburn, fatigue, constipated, heightened sense of smell, dizziness and frequent urination. Anyone had pregnancy symptoms and got a late bfp. I'm so confused.