I'm taking Lantus once a day...(they readjusting it constantly to find the correct dosage for me as my BC level is always high) started at 12 units then 15,20, and am now on 23 which seems to be helping more.
Pissing like a racehorse which is annoying but this also helps to expell BC so I`ve been told.
I also take Pancreatic Enzymes after every meal of snack.
They said I could do walking as it may help with lower my BC.....I`ll ask about the bike.
I was told I had Type 3 Diabetes but my new Endo doc told me I`m Type 1.
Thanks Jay. 
I am not a doctor but from what I just read about pancreatic cancer, it causes type 3 diabetes, not so sure about type I. I believe type II is the most common form of diabetes. It is what my wife had. It started out as gestational diabetes. Regardless of which type one has, it is no joke.
Probably if walking is okay then the bike should be too because it is low impact. You will probably want to take it slow and easy to begin with, so as not to add physical stress to your body.
Read that you have an upcoming doctor’s appointment. Hope all goes well. Take care.