Hi Mel, Welcome!

I'm in Sheffield, England, and we use the mmol/L system. To convert between the American and British, I believe it's divided by 18.02
(18 is fine) which works out in your case 172 divided by - 18.02 about 9.5.

I presume your getting 172 (9 ish) while on Metformin - I'm on 1500 (3 x 500mg) Metformin daily myself. As a rough rule, you should try and aim
for between 72 (minimum) 126 (max) - that's 4 & 7 British :)

172 (9 ish) comes under not-bad but could-be-a-bit-better. I'd suggest if you can get it down to about 110, you'll feel a lot better.

As it happens, I spent 3 years as a bus driver a few years back :) So I know it's a job where you get plenty of upper body movement
but the pounds can, errr...settle? The figures seem a lot bigger under the American system, but for me, it was a case of dropping
those extra daily 'points'. Exercise worked for me. Keep busy, keep moving, when you aren't driving, Simple stuff like walking
rather than driving if you can, walking a dog, or any exercise that gets you a bit breathless and ups your heart rate for about half
an hour - at least.

Over the Christmas holidays, I've managed to keep mine at a 6 - (108 on your meter), by keeping myself busy.

Good luck !