Nauseous after almost everything i eat, especially after fatty foods. have gas, feel tired, bloated, painful spasms & full after eating very litte. ibs?

You may be right: Nausea is a non specific symptom and not always associated with GI disease. Many of the symptoms you describe sound like ibs but ibs is a disease of exclusion. You should see your doctor to make sure there is no other explanation.

Could also be due : Gall bladder problems especially if related to fatty foods. Ask your doctor about a gall bladder sonogram or a hida scan to evaluate gall bladder and its functioning.