Can’t eat without feeling nauseous and woke up this morning feeling terrible to the point of vomiting

I’m on day 3 of quitting weed and I’m almost 20 and been smoking since about 16. I threw up this morning but nothing was in my stomach so i threw up bile and I feel slightly better and no more need to vomit. Can anyone relate or give advice on how I can help it. I would appreciate it!

Update: I went on a bike ride for a few miles and my appetite came back to an extent so anyone coming to this post with the same issue can give exercise a try in an attempt to help with the withdrawal!