Negative test 11dpo

I took a pregnancy test on the 11th dpo but at night (the test said not to but I did anyway) - it was negative.

It was an early detection one.

I’ve since remembered you can implant at the latest at 12 dpo.

AF due tomorrow, no sign of it at all. Had cramps since 7dpo-12dpo now they’ve gone and I have this one pain on one side (had it last time I was pregnant)

Could I be?

Waiting for AF is annoying me now 😂