I was in a similar position being T2 I was prescribed gliclazide unfortunately it didn't agree with me as shortly after taking it I was throwing the contents of my stomach up I was then sent to the over 25 diabetic nurses who gave me my pen injectors to take after every meal and snack was the best thing to happen to me within days I was starting to feel like my old self my energy levels returned and I started feeling better. I was then taken off the Metformin and haven't looked back since.
Have now been recatorigised as T1 and have now just started on Pump Therapy