No, I think these Internet tests I have are pretty low sensitivity. :/ If I'm only 10 or 11 DPO (since I O'd late) I don't think it would show anything. I should start spotting today though if AF is coming Saturday. If no spotting by tonight I might buy a first response and use it in the morning, that will be my definitive answer because I know if it's negative then AF is on the way.