I would recommend you try eliminating different things from your diet to see if that helps. You could try eliminating all lactose from your diet and see if that helps.
yes I do have issues with rumbling and gas.. this pain is so bad. Just had a colonscopy/endoscopy about 2 years ago.. but just had a abdominal ct scan 4 months ago to check for a kidney stone, but my urologist mentioned my other organs, stomach, etc. and said all looked good. But you never know. I am a worry wart. This back pain, hurts bad.. and like I said it does come around to the front sometimes, this is sometimes without the rumbling..
Welcome to the gastroenterology community! This could be gas. Do you pass excessive gas?