I don't have any advice regarding the squirming, to me it sounds like newborn behaviour for the most part. But i do remember that my DD too had rotten farts. We'd laugh and joke about it not being very lady like. We never smelt the boys like we could DD. It didn't last though. No advice on what to do really, being breastfed it could be the foods you are eating but in the early months most things will effect bub in some way until their digestive system matures.

Good luck and enjoy your little one