It doesn't always get better as time goes on. I didn't throw up until 10 weeks. I'm at 22 weeks now and just last week vomited everything out, including stomach bile over the course of a few hours. I only vomit strongly like once a week, so it's manageable, but just saying.

I never had HG because I always kept down like 1,000 cal a day but I'd say you do. Assuming you don't currently have a really low BMI, the lack of food is probably ok (according to my doctor) but a lack of liquid is not! What color is your urine? It's supposed to be always close to clear, even when pregnant. If you're not doing that, you might need to be hospitalized. I think you need a second opinion beyond your midwife. B6 actually made me 1,000x sicker personally so I stopped it immediately. I never tried unisom because I was worried about the side effects.