Thoughts please!!!

I ovulated the 7th or 8th so that puts me at 13 or 14 dpo. I usually have a 13 day luteal phase. I always spot for at least a couple days before I get AF and haven’t even seen the slightest tint yet. Normally my temps start to decline before AF but have gone up the past 2 days 🤷🏼‍♀️ BUT I took a test this morning and BFN! I’ve had headaches on and off and weird feeling stomach (not quite nauseous-more like nothing really sounds good to eat) for the past several days. Has anyone gotten a later BFP? After AF was due?? Been TTC for a year now so I’m crossing my fingers 🤞🏻