You have anxiety. Doesn't mean you have an anxiety disorder per se. Right now, your body's fire alarm, if you will, keeps going off for no reason. There are two ways to get rid of this. One way is to silence it through medication or to turn it off through therapy. The first step for you my friend would be to asses why you are feeling this way. Speak to your family and friends and get insight and support from them. Since I don't know anything about you, I can't suggest why this is happening to you but it could be that you're stressed, repressed, oppressed, lonely ,isolated, relationship problems, school problems, money problems etc etc. At the end of the day you will live.
If self help doesn't work, go to your doctor. Mine really helped me with addressing my anxiety. He made me feel better and gave me some medication to silence the alarm. I will be seeing a therapist this week to try and shut it off completely one day.