I have been prescribed another inhibitor called sitagliptin. The wife has been prescribed saxagliptin and have just read about the likelihood of cancer as a side effect.
It says it's possible, but if have good control and get your blood glucose levels down to manageable levels then the meds will become unnecessary.
Apparently because of the high bloods and not getting control is the reason my wife is on them. She is trying to get near normal levels but it is difficult!
Read about control and how to lower your carbs and sugars on the forum. Convince your GP that you can do this when you are in control. And the worry will go away.
Is there any other reason other than your T2 for being on the meds?