Hello, I m a 23 year old male. I work outside for a tree service. About 2 days ago we working in 90 degree weather and I became ill and couldn t hold my lunch or any water down. I got off work, stretched and drink water because I was cramping so much, then went to bed. I woke up the next morning with a very bad pain in my upper stomach and can t eat without feeling neasues or lightheaded. The pain feels like I have to burp or like I have a rock in my gut I m trying to throw up. It s comes and goes throughout the day and I m still having problems 2 days later. Any advice is greatly appreciated.