Nausea & gastric

I’m currently 12 weeks pregnant and i have very bad vomiting & gastric since week 5. I have also been admitted to hospital 3-4 times in a month because i am super dehydrated. Doctor did give me some medication to lessen the vomiting but it only help a bit. I can’t seem to have appetite or drink anything too. Does anyone have good home remedy to help? When will it get better? How do y’all overcome this? #pleasehelp #firstbaby