I got to the stage where Maxalon wasn't working well enough for me to get to work anymore, so I started taking zofran on my work days. I found one 8mg wafer taken before I got up in the morning was enough to get me through the day.
If you go to the discount chemist, they are about $8 per 8mg dose, as they are not covered by PBS. I made a claim through my extras cover, but the amount I got back was so small it wasn't worth claiming, but it's worthwhile phoning your fund to ask if you have PHI extras.
the other drug I took was doxylamine (which is sold over the counter as dozile, sleep well, restavit). It is marketed as a sedative in Australia, but works as an anti nausea. You take a tablet 30 minutes before bed, and it decreases nausea for the following 24 hours. I was dubious, but on days I wouldn't take it, I was significantly sicker. My doctor recommended it, but it's not well known for morning sickness in Australia. My midwife had not heard of it, so she phoned the information line for medications during pregnancy, and they advised that it's a frontline morning sickness drug, normally combined with B6, and considered safe.
So, for ages, I took the dozile and maxalon. then i dropped the maxalon, and took the dozile and zofran when it was really bad, and I managed to keep working.