Hi Stewcose
I posted a similar thread in Ask the Experts - Metformin and Hypos?
I'm a T2 on Metformin, and unless I'm very careful often find myself in hypo territory. I test frequently, especially if I start feeling odd, in order to establish my BG level. Invariably, when feeling odd, my BG level is in the 3s or v low 4s, on several occasions it has been in the 2s. I have often been told that I can't be having hypos, but my body has been telling me otherwise. The only way to establish the facts is to test, test, test.
Good luck.