I think basically it ain't over until AF sings!

With this one - at 15DPO it was so faint I had that whole squint and tilt you head and yes I think that's a line??? And waited til the next morning to confirm. It was clearer next morning with a FR test too. I'd used a cheaper one the day before...

So that was 16DPO! I'd been getting negs before that, including at 10, 12 and 14DPO.