I really feel for you
@Cornetlady and I'm afraid I'm still at a loss in what to say. I understand your comment about being like a floundering fish with your GP Surgery; I still feel a bit like that with both my formmer Surgery from before we moved and much the same today. I deal with this by firmly taking ownership of each malady and cajoling both the Surgery and the Consultant to help me when its needed. But this isn't easy and for a while was a full time job!
Certainly it may be that you are not definitively T3c. That diagnosis basically hinges around "damage to the pancreas" from whatever circumstance, creating the symptons of your diabetes - ie elevated BG. Who originally told you that you are or could be T3c? Can you get back to them in light of the scan and findings after your very recent hospitalisation and clarify what their considered position or diagnosis is now?
My predicament is that I am totally without a panc'y, I understand how to manage my T3c status using the Multiple Daily Insulin (MDI) process. I don't really understand how you juggle or co-ordinate a substantial basal insulin with oral medications. This needs others to offer their thoughts, methinks!
I can't spot from your responses exactly which background inulin you are on. But to my wholly non-medical opinion an increase to 55 units of basal seems a lot, but I could be very wrong with that view. 55 units suggests there is a presumption that you have considerable natural insulin resistance and thus more akin to T2. I guess only a Diabetes Specialist can clarify this line of reasoning.
Meanwhile bowel issues often arise for people taking the standard Metformin and can become resolved or at least improved by changing to slow release Metformin. Perhaps you should at least clarify to those following all of your predicament exactly what cocktail of oral meds you are on as well as naming the basal. There is a basal test that can be done to determine which part of the day is NOT getting benefit from your basal; but first we need to know what you take.
Sorry this is not overly helpful.