What Causes Sudden Hot Flushes And Shivering?

hi yesterday I had some battered sausage chips from a chip and I brought a drink of pear cider. I was sitting down to have the food and drinks I felt fine but about after a couple of hours I felt hot and shaky I spoke to my mum and she said it could be when I drank the cider a bit to quickly then I felt ok after about 10 mins would you know what it could be?