What Causes Excess Sweating And Vomiting Sensation After Taking Shower?

When I take my bath shower after I dry off I start sweating have to dry off again then I get sick have go throw up an poop at same time. What rong with me I'm usually up set an trying to get to a appointment on time if I lay down after shower an drink a few swallows of coke or Pepsi then burp it makes sickness go away then I'm fine kinda little weakness that's all!:)