How doi stop these feelings. I think i might be suffering with anxiety. I am 23 Male Smoke Quite Fit and healthy. I have been tothe doctors numbers of time coz i go dizzy and feel my heart going crazy, i had a echocardiogram, 12 lead ecg while symptomatic and also blood tests, nothing has ever been found, i feel sometimes un real like light headed but not if you know what i mean, i also get sweating hands and feet, and nausea sometimes with this, also sometimes i will get burning sensations in my heas arms muscle twitches in my legs and arms aswell , how do i stop feeling like this, it is so frustrationg, one minute im fine the next i feel like i am not real.