Nausea😩🔫

Frankie
How do I get all the vitamins and minerals I need when I physically cannot eat, I throw up when I eat a slice and a half of pizza I'm so dizzy and feel like I'm going to faint all the time! I've tried forcing myself to eat but that just makes me puke again! Only thing I can eat at the moment is crisps and chocolate -.- What should I do?Â