Ugh hunnie, it sucks eh! With my son (many moons ago) nowt helped, but I found that with my daughter eating regularly and not allowing myself to get hungry worked. I haven't quite hit the full blown nausea yet with this little one (only 5 1/2 weeks) just a metallic taste in mouth and seriously mild nausea this morning, but I'm hoping that I don't get it this time around! Yeah right haha.
Good luck in finding something that works for you Hun, you will feel so much better when you're able to get it under control. x