Hello and welcome to health care magic.
From your symptoms I think you are having a bacterial food poisoning, possibly by Staphylococcus aureus
, which is still persisting without proper treatment.
My advice is to go to a physician and let him have a look.
He will give proton pump
inhibitors like Omeprazole
and antibiotics like metronidazole
. He will test your blood for raised total count and ESR and stools for presence of blood and amoebic cysts.
Hope this discussion will be helpful to you.
Wishing you good health.