Biggest Suggestion of the Day: Hang in there.
(Not much help, huh?) I worked FT through 4 pregnancies, and I found that I generally felt sick when I was tired. I nibbled saltine crackers, because they are pretty good with that. You could try wearing "seabands" -- they are dumb looking bracelets with a little pressure point that goes on the pulse spot (I think) They help people not get nauseus when on boats, and they might actually help. They don't cost much and they aren't drugs, so why not try them ? I think any drug store would have them, and if you don't see them, just ask at the pharmacy counter. (Can you tell I sail?)
Another hint from sailing: people get seasick when they are tired, and when they are dehydrated. So, I would also take a tip from the sailing community and drink more water, even if you don't feel like it.
I never had HORRIBLE nausea when pregnant, but my 2nd pregnancy was my best. I was in a very stressful job at the time, and when my stomach started to bother me in the evening, I thought it was stress. So I did sit ups and other exercises to get some adrenalin going, and it actually did clear the nausea -- a week or so later, I began to realize I was pregnant. :-) But I continued to exercise at home in the evening when I felt gross, because it did seem to help.
The other thing I did was to eat protein at bedtime. Think about it: your body is building the baby 24/7 -- while you're awake and while you're asleep. but we eat 3 times during the day and never during the 8 - 10 hours we are sleeping. I used a Shaklee protein supplement at bedtime, and I slept well all night long, and woke up refreshed. In fact, that pregnancy was so healthy, that I did not feel as if "my whole body" were pregnant -- only my uterus. The rest of me had lots of get up and go the whole time.
So, try the seabands, drink water, crunch a few saltines, get rest, maybe a bit of exercise . . . and eat something at bedtime that will give you the protein you need to be buildng baby cells while you sleep.
Other than that, the reality is that your body is under stress right now. Some of it is hormonal, and some if it is simply because it has two projects going at once. It is keeping your body going, and it's building a new one for someone else to live in. This is a major undertaking and it is definately stressful.
So be good to yourself. Accept your limitations, and remember that this is only 9 months of your life. If you live to be 75, these 9 months will have been only 1% of your total life. It doesn't feel that way right now . . but it's 9 months of making a healthy baby, and only 1% of your lifespan.