None of the drugs for morning sickness, sadly, are meant to help with nausea, or least that's what I've been told. THey will stop you from vomiting but will not stop you from feeling sick. THat's the hardest part, because I think if your nausea is really bad nothing really helps (ginger, wristbands, etc). I also found it very depressing in my first pregnancy because I expected to get better at 12 weeks and wasn't really better at all till 16, and then felt kind of ok again by 20. Everyone is different but it my 2nd pregnancy (am now 17 weeks) it has helped, oddly, knowing it was not likely to get better until now. I have finally stopped daily vomiting but am still off food.
My only suggestions, because i presume you have tried all the folk remedies, is to try to do stuff to cheer you up: get some good stuff to read or a favorite show on DVD and roll with the punches.
THis time around it has been tricky for me because nausea made it difficult to sleep. I just had an array of trashy books and read them in the night (dh evicted because the poor man's smell made me vomit). I was lucky because this was in August and I didn't have to go to work. Had it been termtime I would have had to have been signed off.
One other thought: i just gave up eating normal food. Trying to eat 'meals' at 'mealtimes' just made me feel disgusting, so I ate whatever I could stomach when I felt I could. That actually helped, but I'm still struggling with the concept of WANTING food, which, as someone who loves her food, is tricky!