Are you sure your "faint negative" wasnt a faint positive? Normally pregnancy tests don't get another line unless you're pregnant. Theres no such thing as a faint negative, you would have a JUST the control line if you arnt pregnant..
He wouldn't of had to pre-*** for the lest over sperm to come out ! It could have come out with his natural lubricant or just the thrusting (fore skin comin back and forth lol) :p xx
As you no about pre-*** its hard to say,, but if he *** with a condom on, they put it back in you without it on, they yes chance you could be pregnant!! Pre-*** can get you pregnant easy enough anyway,, if you only a day late then you may not have enough hormone for you hpt test to pick up!! Test again in a few days,, xx I'm guessing you don't want a baby if your using protection xxx