Hey Jazzy who has put you on metaformin? I'm in my 3rd pregnancy and I've had GD with each one. Each time I've been told any tablets aren't considered appropriate for pregnancy because it can be passed onto the baby and will affect the babdy's BSL. That pregnant women inject insulin because it is a way of directly controlling the issue and then the baby won't be affected at all because all it is getting is a normal sugar level from mum anyway.
I'm sorry I don't have any information on Metaformin but I would be questioning why you have been put on it and not told to inject insulin?
My GD generally presents the same way. I don't have issues controlling day time levels with diet/exercise alone but my morning levels are terrible! I only take slow acting insulin before bed and it has been helping me control my levels very effectively! Most mornings I will wake up and have a level of 4.5. It does get adjusted frequently. Usually at least every few weeks but sometimes a couple of times a week we will have to adjust it!
I also generally make sure I eat a few less carbs at dinner but always have my bed time snack about an hour before bed.
Have they gone through the amount of carbs you should be eating? I was given some great advice by my endo team and that was to actually not stick to the diet that the diabetes team gave me but to eat less carbs! They were asking me to eat WAY too many carbs at meal times and my levels were only getting higher and higher! Since I made the switch my say time levels rarely get above 6.0 and ocaasionally I will get as high as 6.8 but never higher!
If you want to chat more about it I am around!!