Re: Chemotherapy and diabetes questions please help
I don't have experience dealing with these two issues, although I do know that my grandmother was on a low dose of chemotherapy agents for some hematological abnormalities and also suffered from diabetes... I don't know whether she was required to take steroids, though.
You're right: someone should be more concerned about controlling your diabetes. You don't say whether the doctor is an oncologist or other specialist, but if you aren't getting sufficient response from them after considering the usual methods, writing down your concerns so that you are able to articulate them during your appointments, and other things, call your primary care physician, make an emergency appointment, and ask him/her to help you understand the situation and get answers. Maybe you need to change oncologists, or maybe you just need to have an endocrinologist involved in your care.
Remember, every doctor doesn't know everything!
The steroids are pretty necessary to protect your body during the chemo, so... you might have to go on injected insulin during your chemo, and not just on your "chemo" days. If so... you'll probably be able to go back to whatever your meds are once the chemo is finished.