Everyone is different yes but even every pregnancy for the same person is different... for DD, BFP at 10dpo... I started feeling nauseous and DH decided that if there was enough hormones to make me feel sick, they'd come up on a test. Logical, yes? And he was right. I was astounded.

For DS, it was right on 13 or 14DPO. I'd tested earlier and gotten nothing... convinced it was not happening as I'd gotten it so early with DD.

For this one, it wasn't til 16DPO. Totally different again!!! Again, convinced it wasn't happening... and then Murphy's Law struck as you know

My sister it wasn't til 15DPO both times.

ETA: and you are... how many DPO??

ETA2: With DD, it was my first test. With DS, it was my second. With this one, my fourth I got worse with pee sticks as I went along obviously...