Thank for asking to HCM
I appreciate your concern you said that you have sac some where in your belly that filled with the fluid and might be causing vomiting
, but that is not possible id you have history of vomiting after eating then this is to be brought to investigation to rule certain possibilities, till the you can try the following drugs on trial basis if this could helps you,
1) Tab Omeprazole
40 mg once in day
2) Tab Domeperidone 30 mg once in day
hope this information helps you have nice day.