When I try to walk ...my head feels heavy...and it seems I'm not in total control while walking..... Same happens when I was sitting or standing.... It feels like my body is shaking involuntary...my leg becomes like cement..... Vision gets little dim....head pressure..... Also when I'm using mobile with down neck.....my head gets heavy....nerve start paining in head, face, neck, chest & belly.....  start bloating & belching....strange feeling in head.... Looks like body is moving right & left..shaking feeling.... I'm very much depressed.