I am NOT a doctor but I do know where you are right now and it is difficult. After my last GYN surgery in 1989 my surgeon "suggested" I take Phayzme (simethecone) after each meal and at bed time and I still do, it does help. NOT diagnosing you but after a total hysterectomy it is a fact that the GI tract "drops" and can just "hang there" but for many of us when the GI tract drops adhesions cause it to "stick" to anything, the wall of the pelvic cavity, to other parts of the GI tract, around a ureter. Many possibilities. Do NOT think the worst but as times pushes on IF you have GI issues that "doesn't show up on any test" find a surgeon (usually GYN) that is familiar with adhesions and seek help from him or her. Good luck
I can't believe you just posted this because you are speaking about me too.
I had my complete hysterectomy October 2012, too! And I know all about the gas you are talking about! It's a nightmare. For me though it's also painful. I get pockets stuck until it's released but I've also always had a sensitive GI tract so that could be why there's painful gas, too.
However, the gas in general this far out? Oh I have it too and don't have any idea why. I wonder if it relates to where our colon/intestines now set up shop since everything was removed. I really don't know the answer, only that I can relate!