Hi doctor, Whenever i do too much work or focus for longer time after that i feel dizzy or feeling of fainting like i will lost somewhere ..like loosing sense of feel reality. After jogging on the ground it happens mostly. Or if i being at home on my cell phone then after that i dont feel good to go out of the house and feels like to cry for no reason very guilt and upset insecure. Ut happnes in the evening time alott. What is this?