BFN then BFP stories?

Has anyone gotten a BFN at 14dpo then later got a BFP?

AF is due today and there is absolutely NO sign of it starting. Usually I get a bit of EWCM 2-3 days before it starts but all I've had since I ovulated is creamy. I tested at 10dpo (frer), 12dpo (2 Walgreens brand and 1 Clearblue), and today 14dpo (frer). I had faint lines on 2 Walgreens brand blue dye tests but not until after the 10 minute mark so most likely evaps (hence why I took the CB test). So other than those two, everything has been negative. I had cramps at 9dpo but not like usual AF cramps, they didn't hurt they were just annoying. I was hoping maybe implantation but 5 days later, still no BFP. Apparently frer are supposed to be the most sensitive so I figured I'd at least get a hint of a line by now. With my daughter, I tested with CB digital at 10dpo and got a BFP.

Should I just give it up and wait for AF or keep testing? Losing all hope at this point.