What Causes Cold Sweats And Weakness?

I have what I call attacks every so often. it consist of cold sweats by the bucket, weak feeling no strength, very sick feeling, body turns ice cold and I turn whiteish blue color. I have to towel off after one of these because i m so wet its like getting out of the shower. I was told to get blood pressure when this happens and it in normal range. I was told to check sugar level it is also good. Oh by the way Friday night was the worse my whole body started stinging which was the first time that happened