Hi Anne-Marie
whilst I didn't have chemo I have suffered gut problems for years I have pain without acid was diagnosed years ago with reflux have taken nexium and all the over the counter meds which ease the symptoms but never go away
a friend got me on to a pro biotic drink from the health food store it is a coconut pro biotic with lemon myrtle you have 20 ml with a glass of water everyday and I haven't looked back it's amazing.. it has 10 billion good bacteria to help your gut it's worth a try
hope this helps
pam x