I'm not sure either. Just guessing here, but thinking a chemical pregnancy could mean the way birth control pills trick your body into thinking its pregnant, and clinical pregnancy could mean you are actually pregnant. i do know that if you get pregnant to soon after a mc, you are more likely to mc again, because your uterus has not had time to heal up sufficiently. Or it could mean something like your are technically pregnant, (meaning egg & sperm met) but not growing a baby, could be a blighted ovum, as already mentioned or a hydatidiform mole. Or? She should just call him back and ask him to explain what he meant.