If the world has morphed into an olfactory wonderland, you might want to head to the drug store for a home pregnancy test. Whether it's the noxious fumes of a pedestrian's cigarette or the sweet aroma of a honeysuckle bush, the nose frequently knows when you're expecting. Again, you can thank those pregnancy hormones for your new superb sense of smell [source: Mann].
We suggest using turning this keen sense into an advantage by surrounding yourself with scents that make you feel great. Herbs frequently do the job. Think lavender, rosemary, mint or ginger. If these don't help and are instead making you feel nauseous, open your windows whenever possible and ask your friends and family to be considerate.