nausea and poor appetite

I’m in my first trimester, ~7 weeks pregnant now. i’m nauseous all day and when i’m hungry, i get gastric (can feel the acid in my stomach) yet when i eat i feel like puking. i’m already severely uneerweight and i havent been gaining any weight because i can barely eat my meals without wanting to throw them up 5 mins later.. any solution to this? :( #pleasehelp