For1+ year i wake vomiting food eaten 12 hours prior also extremely bloated. sometimes diarrhoea too. constant nausea. worse when eaten high fat food?

Gastric retention: You have a problem with the stomach emptying. It is true that fatty or oily foods slow stomach emptying but food should not be retained in your stomach all night long. You should be evaluated by a gastroenterologist who will determine whether the retention is due to mechanical or functional problems in the upper gastointestinal tract.