Hi,
Welcome to health care magic,
Stomach bloating is caused mainly because of air swallowing known as erophagia.
The other causes could be
irritable bowel syndrome,dyspepsia,
constipation,bowel obstruction or parasitic infestation etc
You might need to undergo routine blood count,stool examination for routine microscopy/ova/cyst and ultrasound abdomen and if symptoms persists then upper GI endoscopy.
You should start some medication like proton pump inhibitors(
pantoprazole or
rabeprazole) witth avoid excess carbohydrates and fatty foods,
avoid oily and spicy foods.
You foul smelling stool could be due to some parasite infection,so yes you will require antibiotics like ofloxacin with ornidazole,antihelminthic like albendazole 400 mg once only with other symptomatic treatment.
If you still have these problems then u should go to gastroenterologist who will know all the investigations and can treat underlying cause.
Regards,