I know you've already received about 67 million replies and I'm a bit late to the party, but I'll echo what some have suggested and it's what I did. Last December, I decided after losing weight to the point it was just no longer acceptable, I booked an appointment with my GP and I had suggested wanting to use insulin. I know that sounds crazy, but I'd lost weight and was finding it harder and harder to maintain bg levels over the last 3 years, not that they were bad. My A1C was 5.9.... but it was just getting so much harder and required so much more exercise to keep that level... but there were now too many times when spikes were way too high.
So, I had the c-peptide and fasting level done... the wait for the test was longest I'd ever had to sit for it, so blood was drawn about 13hrs after I last ate. My c-peptide was 0.3 and fasting was 6
My problem was the spikes after meals,were too high. Physically, lifting weights was part of my regimen and the lifts were getting lighter and lighter. I would be totally worn out for days after a routine that previously never had this effect. I was just run down hormone wise.
So, to cut a long story short, I stated on insulin. The fatigue went, my strength returned, I was no longer worn out. It had reversed these symptoms. My point is just don't let it get to the point I did. Get the c-peptide and fasting done. It should make the decision of what to do that much easier when you know what that pancreas is doing or not doing. It's not the end of the world to have to start on something. It was frustrating to have to start on insulin at first when you fight so hard to avoid it, but I don't regret it. Life has become so much richer again. I'm not saying you need insulin, but out of all the drugs available, it seems like a better choice then some of these oral ones. Especially when you are taking other medications, as we both are for other conditions. Interactions, both known and potentially unknown or rare are still something that must be considered.
Good luck. I hope you get things sorted out asap.