You can't just sit back on this. You need to go somewhere and get help
It came out of the blue for me too. That doesn't make it less happen. It is what it is and your bs levels are telling you your body is not functioning right. It doesn't matter why. It is what it is and needs to be addressed.
Not to scare you but I was on a drug much like you and as I meantioned it was ineffective. I believe it burnt out the remaining beta cells I did have and straight to insulin I went. Plenty of doctors misdiagnose type 1. I actually won a law suit with them as they left me for almost dead!! Get the tests.
The earliest i can get in to see the diabetic doctor at my GP is on the 21st