Newly diagnosed. What helps control symptoms of gas and bloating?

Hello, My husband, 57, is newly diagnosed with pancreatic adenocarcinoma. As we wait for our appts with genetics, surgery and oncology at Mayo, we are trying to figure out how to treat the gas, bloating, and abdominal pain. It would be a little easier to deal with the shock, grief, and huge unknowns if he wasn't feeling sick 24/7.
He's taking Bentyl, gas x, and sometimes pepto bismol. Eating every 1.5-3 hours. Pretty sure we're sticking to the right kinds of food, but it's hard to know.
Any help from those who have experienced this would be much appreciated. Thank you.