2 days late for AF and no BFP!!

Lauren • mommy to two boys 7.25.17 & 12.18.18
I am 2 days late now and I keep getting BFN. I know 2 days isn't much but the TWW was hard enough!! I use OvKits and it showed "high" on 4/3 and "peak" on 4/4. We BD everyday from 4/1-4/5. I'm feeling fatigue, and mild pressure but not like usual cramps. Oddly enough when I get AF my right knee hurts badly and it's usually the first sign I'm getting AF. So far no pain at all and not even a little spotting. Thoughts from the group? 🤔