Why do I feel dizzy all the time? I am a 20 year old male, I weigh 127, and I am 5'7. I've been feeling dizzy, and tired.sometimes I have shortness of breath, and my chest kind of hurts. I freak out when I feel this way, and my heart starts beating really fast, and it feels like i'm going to pass out. I went to the hospital 3 weeks ago, and they said my heart was fine from what the ekg said, but I still feel this way...is it just anxiety?