i think that some people can smell the sugar in the urine, but it's probably unlikely. plus, i think your chances of that happening decrease with second pregnancies (am i wrong about that? somebody?)
it could just be you. my most embarrassing pregnancy moment with dd went a little like this... i kept thinking that i smelled (not my pee) and one day it seemed particularly bad and i dr googled and i RACED to the ob and informed them that i had vaginosis, because of the smell. and.... the test was negative.Â
 so stuff smells different or else your nose thinks it smells different if it doesn't, sometimes with the pregnancies.