Hi Dr. Rynne My Name Is Kerwin I Am Always

Hi Dr. Rynne my name is kerwin i am always have dizzines i cant stand for a long time.. And i cant sleep well.. I wake up every 2 hrs. And i fell so very weak.. And i always expirience muscle twiching.. But my laboratory exams are normal the doctor said when i get consulted.. What would be the problem in my body? Tnx!