Preparing for ELCS in 12 days - supplements etc?

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I am having an ELCS in 12 days this is dc3. Dc1 was normal, dc2 was emcs after doing the whole hog - 10 cms, ventouse then got stuck and recovery was hard as they also tapped my spine with the epidural. Anyway, dc3 is planned section as have gestational diabetes and polyhdramnios and looks like might be a big one. I know planned sections can be v different from emcs but wondered if anyone had suggestions of supplements or vitamins I should be taking before or after to help with the recovery. I really really want this to be a pleasant experience. Thanks