Horrid heartburn and vomiting- suggestions?

I had a glorious 4-5 week stretch in my 2nd trimester where food was amazing and tasted wonderful and I was able to gain back a good bit of the 21 lbs I lost in my first trimester with HG.

I'm now 32w6d and have had much more vomiting since about 27 weeks and severe heartburn for the past 3ish weeks.

I take a PPI daily (protonix), have been chewing on tums, avoiding anything spicy, and lately even sugary foods that would increase the acid in my stomach. I have zero appetite most of the time and literally wake up steady to vomit up burning fire stomach acid. I try to eat a bland snack in the middle of the night when I'm up to pee to keep my stomach from being totally empty, and this past week have added Pepcid once in a while as well. Even water burns like fire after I'm done drinking it.... and I crave water like crazy! I'm taking zofran for the nausea and once in a while phenergan when it's super bad.

Any suggestions would be so appreciated!