Hi i m concerned about some things I have been experiencing. I m just 13 and i m 8.4 stone and a couple of nights ago I was watching TV and I stood up and I got really lightheaded and my fingers were a little numb so I went and had a drink of water and I felt a little better so then I went to bed. I was fine the next morning but at night, I was on my computer and started to feel lightheaded again so I told my sister and she told me to have a drink of water and go to sleep. About 5 mins after I was trying to go to sleep but then I was experiencing a sensation like trapped wind and I felt bloated so I went to the toilet to see if it helped and it did a little so I went back to bed and tryed to get to sleep but my heart started to feel like it was fluttering and I felt warm so I decided to go back to the bathroom and go to the toilet then I went back again and I fell asleep. I feel fine today but a really mild headache and a bit of weakness perhaps. I also had a bit of dihorrea and feel bloated when I drink water. I m abit worried this is a condition or symptoms of a disease. Thanks.