Question - no appetite?

Anisha
Help.
I am on Dpo 8 or 9. I had a horrible heartburn 2 days ago. Yesterday it was milder and today almost gone. But i am burping all 3 days and i have zero appetite. I mean i am such a big foodie! And i couldnt eat 2 spoons of my fav food dish for dinner tonight. In just so full all the time. I feel like ill vomit if i eat more or that fod. And wierd taste in mouth - not all the time but sometimes in a day.
Is this what feeling nautious means? Is it normal pms syptom? Never had this before