Right abdomen noise from 6 months.

From the last 6 months I have noise right side of abdomen (especially upper right) and pain at random times. Pain usually comes when I lie down on the right side. It feels as though something is pushing from inside. I have done all tests. Ultrasounds, endoscopy, ct scan with IV contrast, blood tests, mri of bone . All are normal except for ultrasound and ct scan which shows mild fatty liver. The ct also shows left inguinal hernia which the doctor told is not an emergency to operate given the current situation. I still keep getting noises and pain from right side of abdomen, it goes to my back too. My doctor tells me it's IBS but my stools have become normal with no diarrhea or constipation. He has given me tryptomer tablet which I have discontinued to use. What can be the issue? Has my doctor missed something? Sometimes the pain reduces when I pass gas. But not always. The pain is especially felt when I lie down on my right side.