Advice needed! I was diagnosed with gestational diabetes 2 weeks ago and have been on metformin for a week following a very strict diet due to the high blood sugars ie low carb and sugar intake. My metformin was increased to the full dose a couple of days ago with no affect. My diabetic midwife rang today for all my readings and said they were too high but will give me a few more days on the increased dose but more likely than not will have to go onto insulin. I really want to avoid it if it can be helped any advice from people going through the same thing .