Antibiotics/Baby diarrhea

I ended up with mastitis and was prescribed antibiotics. They've given my 2 week old horrible diarreah and caused a very bad diaper rash. Almost broken skin. I looked up natural cures online and found a few. One was plain yogurt, another was coconut oil. I happened to have plain Greek yogurt and coconut oil, so I mixed them together and refrigerated them. I've been using that concoction for a few days now. His rash has cleared up significantly, I just thought I'd share for other mamas who prefer natural cures. I wish I had one for mastitis.   😕