hi, i also keep taking tests and they come up negantive but i know im pregnant..im going for an ultrasound in 2days only because its the easiest way to find out if im pregnant 100% sometimes negative means just that but alot of the time it means there may not be enuff horemones showing up so the test cannpt get a proper read..best bet is to go to the doctors and get an ultrasound or blood test…good luck,daniella ps:let me know whet happens ok and you can email me anytime you need to.