Every time i eat something with a lot of fat in it few hours later i get the feeling that i should trow up...

Gall bladder?: I would get an eval. You could have acid reflux from eating fats and getting acid build up to digest it, that irritates you and causes nausea. The gall bladder produces bile which helps break down fats and if you have gall stones or gall bladder issues, nausea after eating, especially fats, can occur. Avoid fats and get eval, good luck.