From 6w to 18w I was only sick twice in the mornings, but afternoons and evenings were miserable! Mornings I felt pretty good, but by about 1:00pm I'd start feeling a little nauseous, and by 4pm I was miserable. I usually only threw up 2 times a day, but I had a few days where it was 3 or 4 times.
The funny thing was that food didn't set me off - there was no particular food or food smell that bothered me. Unfortunately, the smells of garbage, dirty laundry, dirty dishes, dirty bathroom, etc. etc. really bothered me, but so did the smells of cleaning supplies!! I could smell the toilet if it hadn't been cleaned in the last 6 hours, but then the smell of the toilet bowl cleaner would also make me gag!
Poor DH, he was stuck doing most of the cleaning and doing it at least once a day (totally cleaning the bathroom, mopping the floors, taking out trash, etc.), but I had to go sit outside or in another room until the cleaning odors were all gone.