Hello and welcome to HCM,
Absence of bowel movements or more appropriately no passage of stools or gas for 8 days followed by passage of fluids accompanied by gas and bloating after taking laxative is definitively not due to food poisoning or infection.
Food poisoning or infection last for couple of days and are characterized by
abdominal pain and diarrhea or sometimes dysentery (blood in stools).
These symptoms do not last for such long duration.
Thus, I am of the opinion that you may be suffering from laxative abuse or
irritable bowel syndrome.
I suggest you to
consult a gastroenterologist for clinical assessment.
A routine stool examination may be required.
A detailed current and past history of gastrointestinal trouble, history of laxative use and imaging study like ultrasound abdomen will be required to investigate the cause of symptoms.
The
gas problem can be temporarily controlled by taking
proton pump inhibitors before taking breakfast empty stomach.
However, this is just temporary measure and definitive treatment can be planned after complete work up.
Thanks and take care
Dr Shailja Puri