I am a fifteen year old girl and today I experienced something out of the ordinary. I was in the shower for about forty five min and then suddenly I was getting really tired and needed air. I immediately stopped the shower and started to feel really dizzy, nauseous, and lightheaded. I couldn't focus on anything and I felt like I was going to through up. Immediately after this, I started having diarrhea for ten min straight. After that I started shaking really badly. Im not exactly sure why this happened, I ate a normal amount today… I recently became a vegetarian and experienced some weight loss, but I was completely full today. What could this be from? Please help me, I am at a loss for words.