all day morning sickness

I have had it pretty rough. I am 10 weeks and had nausea since 2 1/2 weeks along. I tried unison and b6 then diclegis and phenergan with no help at all. I also have done crackers and yada yada tricks with no help. My stomach gets upset with my prenatal vitamins as well, which I have tried 4 different brands now at different times of day etc and no change. Talked to my dr and all they suggest is going to the ER for an i.v. Not exactly in a position to be paying ER copays. Any advice out there?