You must be on some kind of meds. for it if you have had it that long, so have you been switched to something different? Maybe you system is getting some side effects from any meds. your on.
I know Metformin can give you stomach problems and many folks experience Diarrhea but usually it goes away after a certain length of time. When was the last time your sugar levels were checked, as maybe they have changed? Sometimes you might need an increase or decrease depending on how well it is controlled.
Best wishes...JJ....
