Sue,
We get used to upset stomachs that are gone after an hour spent on the toilet, but there are nasty viruses etc that can make you this way for up to 2 weeks. So long as you are not experiencing physical pain, blood in stool, or a fever then you should be ok for now. Keep your fluid, potasium, and vitamin levels up.
You did mention oily foods. if you think fat is setting things off this could well be a sign of gall bladder issues, Try and make note of what you eat.
Have a feel and a prod around the area of your gall bladder and see if there's any tenderness.just under your sternum and slightly to the right.
Sometimes fibre like bread is not best for an upset gut, try milk, porridge, oily fish.
If you have access to medical care (not sure how it works in OZ) a blood test should show if you are fighting a virus or have gall issues.
Hi Sue,
We can't guess by this symptoms, consult with your doctor and take proper treatment. Because he is the only one who can properly guide you and suggest also. Don't be nervous.
My guess is IBS. try some metamucil for a couple weeks and see it that helps