I used to train with a woman who was on a insulin pump. She still wore it when she trained (don't ask me how), and she had been training for at least 10-years.
Is this something you can ask your doctor about?
I have problems with low blood sugar, and find having some almonds before class helps ward off blood sugar drops. Maybe you would like to try that. It seems to work well for me.
best wishes on this, Rachel