BFN...4 days late

Brittney • 34, Ohio TTC miracle #1 fingers crossed, been trying for awhile ✨
AF was due 01/31...still hasn't arrived. We have been trying for so long. Took a PT this morn and of course got a BFN...overwhelming sadness instantly. When I get excited and I take the test, it's been my experience that AF usually comes the same day if not the next. I usually don't vary to much from my 28 day schedule, 2 days is the most I've been late. Just waiting for AF to start since I took the test and another disappointing month can go by... Has this happened to anyone else? What were your results? Just a disheartening day...