Had botched gallbladder surgery 5 years ago and numerous revisions, stents and still have daily pain, nausea just can't even begin to explain it all but you will always have difficulty from botched surgery!
I have also had hepaticojejunostomy after a surgeon botched my gallbladder removal surgery. I have been in pain ever since then. If you press your thumb gently into the soft tissue just below where my ribs meet the breastbone it is very painful, all the time. I belch and have horrible acid reflux which was never a problem before my surgery (1997). I have been to four doctors, had blood work done, ERCP, etc. and they always tell me its just acid reflux, just take Prilosec. I have sudden extremely painful episodes with belching and feel like my liver is swollen and I have shortness of breath, sweating, and cannot lie down. The pain has been so unbearable at times my husband takes me to the ER and the ER docs give me morphine and tell me to go back to the gastroenterologist, who then tells me to keep taking prilosec. I am miserable about 80% of the time and feel that my doctors are either not willing to tell me the truth, or just don't give a ****. My symptoms are slowly and steadily getting worse. Please tell me if you've made any progress!
If you're still having pain after having your GB removed, please make sure that they check to make sure that no stones or sludge are found within the common bile duct. In some cases those problems can not be seen via CT. You also need to look into the possiblity that you may be experiencing SOD, sphincter of Oddi dysfunction. It can cause quite a bit of pain similar to a GB attack.
In many cases, some find processing fats very problematic after GB surgery. It may be helpful to follow a low fat diet especially if you're finding you've had a change in bowel habits also.
It sounds like he is just describing your symptoms being "post" the surgery. It is ambiguous and not a real diagnosis, just a statement of your problems past the surgery.
I would look into having an infection, scar tissue or some small bile injury problem that has not been determined by a CT. An ERCP would be more beneficial I would think. I am not a doctor, just a lay person that has seen the damage on a person even long after the gall bladder removal. Don't go to the person that performed the surgery or within 75 mile radius of the person. It helps get a doctor not worried about peers and able to work with you as a patient.