Please go to the Doctor and get some Blood work done, there is so many other thing that can be wrong. I had just a routine blood work done around 12 or 13 years ago. I had diabetes and also high cholesterol didn't even know it, they are related.
I have took ER Metformin the whole time I have had Diabetes and it has kept my sugars in check. My Doctor used to give me a year's worth of my Med's till she noticed that I was not coming every 6 month's like I was supposed to. She told me a lot can change with your health over 6 months. Now I have to go every 6 month's that is all she will write my script's for. Which is fine I didn't know how important it was to go that often. Please don't gamble with your health you only have 1 life and it's such a short journey.
Good luck and take care of your Diabetes Please....