My Inner Right Labia Just Started Swelling Today. I'm Not

My inner right labia just started swelling today. I'm not sexually active. I have been experiencing leg numbness that goes down to my feet. Specifically on my right leg. I have had a lot of right inner thigh/hip pain. When I stretch in a pike position the back part of my right knee hurts terribly. It feels like its being pulled or it's stuck. It's hard to describe. Could I have pitched a low back nerve? Occasionally my arms, fingers and finger tips have also felt heavy and numb. I'm not sure what to do and I'm really scared. I'm only 18 years old.