Zofran Side Effects

So I’ve been taking zofran since like week 8 of my pregnancy for my severe morning sickness, and I’ve been fine up until now. About a week ago I started getting a really bad & annoying headache that Tylenol just won’t touch. I finally went 24 hours without taking zofran and I was so happy because the headache went away and I thought I was in the clear, but no, still super sick, so I decided to take one and not 20 minutes later did I get the headache again. I think at this point I’d rather be throwing up all day over this headache 😭 I’m allergic to Dramamine (so no Unisom or Benadryl), any other suggestions that might help the sickness? I’ve also tried B6 and it didn’t work for me.