Wondering is Unisom/b6 is truly as effective as Diclegis?!

I’ve been severely ill since week 5 and I’ve lost a lot of weight and even had to do go to ER for IV fluids. ((Likely have HG)) I’ve been doing the Unisom/b6 combo at home and it has literally done nothing. My doctor thinks I should keep with it, with the thought I may decline even more if I stop it. I’m wondering if anyone did the Unisom/b6 cocktail..didn’t work, and then tried the Diclegis and had it work. Are they really equally effective?! Or is it worth pushing for an rx? I was recently put on Phenergan and that also did nothing..I almost was throwing up more 😑 Thanks ladies!