Welcome to the Pain Management Forum. I am sorry to hear about your painful symptoms.
Although you are always welcome here I encourage you to post this in our Men's Health and Urology Forum. I think they may have better suggestions for you. You can locate those forums by clicking on the word Forums in the left hand side of the blue banner towards the top of this page. Out forums are listed in alphabetical order. If you have any problems locating those forums please let me know.
I wish you the best of luck and hope you will find a resolution to your painful symptoms.
It sounds like it might be what's called "diverticulitis" and is pretty common in most people, but not all feel the pain. It's caused from not having enough fiber in your diet and the aging process. To be sure, you could ask your doctor to send you for a lower GI series test. Good luck!