I Can't Figure out the actual problem?

On 15 August2016 , i was returning from gym, and walking back home suddenly i felt like instant weakness ,felt dizzy, like something popped inside me, i thought i was gonna die, so i reached home and feeling a little out of breath,i wasn't able to eat complete dinner,at midnight we went to hospital , they said dehydration gave me glucose , but i had a lot water at gym, so next day we went to a doctor Medicine and Cardiology , he checked me , blood tests were normal,, he said i remembered something and i panicked but i don't have anything that depresses or burdens me , ;later i started feeling pains or pins in stomach , had a Contrast CT scan of whole Abdominal and ultrasound everything came out normal and stomach problem went away , CT of Neck , everything normal, than CT of head , since i have sinus problem which is old and i know it, so currently i keep touching my scalp and hairs , i feel jerks when i move my jaws sometimes, my right jaws crackle sometimes