Should I bother testing again?

Ok so I only had sex 1x this month (thanks business trips) on CD10. I didn’t test for ovulation but I had EWCM CD11-CD17 and I usually always O around CD14

Well now it’s CD30 and I’m 2 days late. I’ve been cramping on and off with light brown CM since CD25 but AF has not come. I’m like CLOCKWORK with AF. I did have travel but nowhere super far/out of state and I wasn’t that stressed. Less than normal actually.

I took a 25HCG test yesterday and today with second morning urine (I keep forgetting) and they are both negative. Should I bother testing again with a FRER?

It seems ridiculous that I would be pregnant off of 1 time 4 days before ovulation but I’m never late.