Ohhhh, I've got my fingers crossed for you Karen!

False positives are VERY rare, and "true" false positive is actually a malfunctioning test. HPTs measure the HCG in our body, the only way you have HCG is if an egg has implanted. Often what a doctor tells you was a false positive (if you really weren't "pregnant") is actually what they call a "chemical pregnancy". Your body has the egg implant and everything, but the cells aren't actually growing. You've got HCG in your system then, but no viable pregnancy. USUALLY those are the kind though where a woman doesn't even know she WAS pregnant because she bleeds heavily around the time of her expected period.