We may not all respond Sweetpe but I can tell you we all wince when we read about one of our OCF family in pain. Generally speaking cancer itself isn't painful, perhaps its a consequence of the surgery. Chemo can cause hearing loss, maybe that is causing the ear problems. Does she have tinnitus?

Keep everything moving along (food and water going in, poo and pee going out) and keep the doctors informed of changes in the side effects. I know you're doing that already. Chin up, we are there with you.