I had a pain in my top right part of my abdomen thats been on and off for a little over a year. At first I thought it was an abdominal strain like Gary Payton, but now I think it might be a hernia, but I can't tell. How are they diagnosed. I had an ultrasound in the area to check for gallstones which came back negative. Would the ultrasound have been able to pick it up. Would an x-ray be able to detect this?