I am not a doctor so you need to go ask one, but it is my understanding that anything really nasty needs to get into your bloodstream.
Normally when barebacking someone whos infected any nastys have a chance to work a way into your system through your urethra.
In your case its a little bit of blood smeared on your bell end for a few seconds so unless its covered in cuts or spots, the only other way into your system is into your japs eye and from what you said thats remote and even more remote that whatever small amount made it in then infects you, if she had anything at all.
As for your other half, well that was just daft of you wasn't it?
Your only options are, to fake erectile dysfunction until you have been checked, or tell her, or rubber up for everything, or be a dick head and carry on shagging and hope you have nothing to pass on.