Well said Kell.
As for BPH......could be many things causing that other than gallbladder. However, abdominal pain in the right upper quadrant (where your liver is) after a fatty meal may be cholelithiasis (gallstones....which get pushed into the gallbladder neck and common bile duct when the gallbladder contracts in response to fat, thus causing pain when the gallbladder is obstructed) or cholecystitis (inflammation of the gallbladder itself.
Could be quite a variety of things though....gastritis, gastric or duodenal ulcer, infectious (unlikely with a 3 week course though), pancreatitis (especially if you have had gallstones in the past or drink a lot of alcohol, etc), etc. would be some abdominal causes.
Need more info.....when do you get the pain, where is the pain (focal or diffuse), timing in relation to meals, any nausea / vomitting, any blood?, associated diarrhea, losing weight? / malabsorption, jaundice?, ever had anything similar in the past, any exposure to hepatitis (hepatitis A in places like mexico) or dirty needles / IV drug abuse, etc. (hepatitis B or C), anything that relieves the pain?, do you have the pain on an empty stomach or does it awaken you at night, "heartburn" / acid reflux with it?, etc. etc.