I didn't know the name for it but my SIL has it. Like you, from birth or as far back as she can remember. She remembers her mom suspecting she couldn't smell when she was around 6 and holding all sorts of things under her nose to test her out - onions, garlic, cleaners etc. She always thought the 'smell' thing was just a joke people played.
It has caused some problems with her babies/toddlers because, although she checked them often, everyone always knew when one of them had done a real lulu in the diaper and to outsiders looking in, it looks like she was just ignoring it. She got labelled as a bad mom more than once.
Trish