Magnesium Citrate didn't work?

I took almost an entire bottle of magnesium citrate about five hours ago and I drank two cups of water after that. My stomach got really full after that and I couldn't drink anymore. Later I had a little bowel movement and then a lot of water with very little diarrhea came out. Now, it has been about two hours and still haven't had another bowel movement. I heard many people say taking magnesium citrate would give you nonstop diarrhea but, it doesn't seem to be my case.