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So I am now 22 weeks pregnant and ive noticed that I now need less insulin than in my first trimester. I'm worried as I thought I would need more and have read that it can be a sign of placenta failing BUT for a few weeks now I have gone from taking 2 metformin (1 at breakfast and 1 at bed) but have now added a third tablet at lunch on the advice of my consultant and diabetic nurse. Do you think this is the reason im low all the time or something I should worry about? Thanks x