Good luck Mitch....fairly confident you must be pregnant! I know of people getting false positives AFTER the recommended time on the box (ie. looking after 10 mins or whatever) but I've never heard of a false positive when following the instructions; even if it is faint it's likely to be a proper BFP!

(Same thing happened to me....I retested four more times over the next three days and each day the test results got stronger! *L*)