Morning sickness and gastric remedy

Hi mummies! This is my second pregnancy but it’s different from the first. My morning sickness is horrible and lately I have been having gastric. It makes eating or drinking worst since I can’t stomach it for more than an hour. My lips are getting dry, which probably indicates I’m getting dehydrated. Can I get your advise on what is the best food or drink for me to take so I won’t throw up.