Sweet Person, I have had it and it is very difficult to treat because of where it is located. That is why you were prescribed a powerful antibiotic. This will NOT go away by change of diet. Your stomach will swell if it isn't already and be painful to the softest touch. You said the antibiotic didn't agree with you, but you didn't say how. Please go to the ER no matter how long you have to wait. If the pain is critical do NOT drive yourself call for a rescue squad to take you. I KNOW THE PAIN YOU ARE IN but it will only get worse.