hiya i know i should have some idea but i havent got a clue to be honest. my boyfriends cousin has done 3 clear blue pregnancy tests and all came out positive then a week later she did another (not sure if was a clearblue) and it was negative! why could this be? she really wants 2 know but im unsure cos im never had a positive then negative, always been negative and then positive for me. id be greatful if somebody could reply to me soon. thanx sam x