Hello,
I'm really sorry to hear about your cancer and your pain. Managing your pain, I believe is a major part of treatment. Communication with your doctors and nurses, about your pain is very important. If the doctor didn't seem to be listening to your concern, try talking to his nurse.
You are the only one who knows what kind of pain you are in and how badly it is effecting your everyday life. If they do not wish to incease the dosage of your medication, and it is not recommended that you take more then the amount prescribed, ask him if you can have a lower dose, fast acting perscription as well to take when the pain is unbearable. I take 40mg oxy every 12 hours and i have 5mg oxy, to take when needed.
As long as I stay on schedule with my 12 hour, it works alone most the time, just fine. But on days when I've went up and down the stairs doing laundry, had to go shopping, well just done any extra activities, I find the pain increases and the quick acting pills are a blessing.
You might try going to the National Cancer Institute and get the booklets by Johns Hopkins they have about managing cancer pain and how to talk to your doctor. As well as any other books that may be of use while your on this road in your life. Or you may even be able to pick up copies of the books in the doctors office, your doctor is an Oncologist.
Best of luck to you
Take care
Lisa