I get severe cramping too. I call out screaming in pain and there is nothing anyone can do. It has mostly happened at home getting in and out of bed has been my worse place. But I had one incident at my daughters house. I think it came from sitting in a chair different from what I was used to. But what I do is take potassium magnesium (2) during the cramping spell it helps almost right away and gives a calming effect. I too will hurt the next day. I hate them. I worry I will have one in public. Hope you have some answers