Some of my body parts(stomach, back etc.)keep going itchy then numb and yesterday one side of my face felt tight and heavy for a few minutes?

Let's talk...: Given your young age, and the diffuse and fleeting nature of your symptoms that involve many unrelated areas, several possibilities come to mind: 1) neurologic disease like multiple sclerosis (possible but unlikely); or 2) anxiety with somatization (is this a possibility for you?) have your doctor check you out, then please get back to us with a progress report. Good luck...