maybe you tested too early, you should wait a few days and test again
to early, or preg symptoms can be same as af signs
pms, not pregnant, hormones, too early you tested.it can be a number of things.
you need to give more infomation.
are you trying to conceive?
are you late on your period?
if so, how late?
what symptoms are you having?
are you having unprotected sex?