when I get my period I always get progressively worse cramps for the first hour or so. its not stabbing pain it’s more severe discomfort and feels really achy, in both the abdomen and upper thigh. about one to two hours in, I get shakey and get cold sweats, usually accompanied by diarrhea and lightheaded ness. For the most part, it goes from relatively light cramps to this in less than half an hour. I usually throw up a couple times, and then sleep it off. I don’t get any PMS symptoms and only start cramping after the bleeding starts. Is this normal? What can I do?