Most women don't even see the hint of a squinter until 12dpo. I agree with @tuxcat. If it was 13dpo then I'd probably agree.
So now the question is....do you keep on POAS until BT (though forget that if you do the other Pregnyl shot) or do you wait a few more days & have another go & see what shows (if you don't do the extra Pregnyl)???😐