Hi, I ve been feeling some weird symptoms lately(since like about a year or two) of lightheadedness whenever i get up from laying down or sitting down after a while. Recently I also have been feeling some pressure on my chest and difficulty breathing (irregular breathing as if I forgot to breathe sometimes and gasped to get some air) . I went to see a doctor for my fainting symptoms when I got up but she said that I was probably dehydrated (and didn t tell me to go pass any exams) but I drink enough water during the day and I don t think that is the reason. I have seen on internet that it might be anxiety but I don t feel anxious at all, exept for some situations here and there during school time.