I am a 55 yr old reasonably fit male. I weight 87kgs at 173 cms tall. Overnight I have developed a lower abdomen pain - below the stomach button. I have now had it 16-17 hours. It is deeply seated. I haven't had the much to eat since I am doing the 5/2 diet to reduce my weight to a goal of 83kgs as I am an active rugby referee in New Zealand. I ate the same as my family last evening (i.e. a small piece of fried pork, 120 gms boiled potatoes and 100 gms mixed green vegetables). I have been able pass urine after drinking 1 cup of tea and 2 cups of coffee and probably 2 litres of water. I thought it was a bowel problem but I was able to go about 12-14 hrs ago. I have suffered from lots of gas over the last few years and that can be really uncomfortable and again I thought that was the problem but it is a sharper pain. I had a small dinner 3 hours ago and the pain was immediately worse. I have been having raspberries, blueberries and cherries over the last week and wonder if a cherry stone could a blockage or could there be another issue/