15dpo still getting negatives... Just here to vent!!

Never been so confused before. No AF. No bleeding or spotting. Been lightly cramping and lower back ache on and off for a week slight nausea a few times, very tired but I can't sleep very well. I've been reading stories about women getting their BFP 16dpo or later I'm just praying that's the case with me. It's exhausting hoping for a BFP and it's all been negatives. If I'm not pregnant and AF shows I'm just feeling done for a while. It's been a little stressful this cycle for some reason. I tracked ovulation got 2 positive ovulation tests 2 days in a row had sex my whole O window. Now I'm about to be 2 days late no BFP. Frustrating as ever. I've never cramped for a week like this and no AF. I usually get cramps and start the same day or one day later. Praying for a BFP in the next day or two. Just so tired of testing! 😩😞