What Causes Dizzy Spells And Tingling Sensation In Arms And Legs?

Question: My 17 year old daughter is in good health. Over the last month, she has been having dizzy spelsl, brief moments of blackouts, a feeling of disconnect with her body, sharp tingling in her arms and legs and feels like fainting. Sometimes, her limbs with twitch when she has these episodes. I would say she has had 3 or 4. Today, it happened again. Everything went black and all the symptoms occurred. I want to take her to get checked out. I am concerned these symptoms can be a sign of something more serious. She has not passed out, but has felt like she was close to losing consciousness. What could be occurring? What type of doctor should we go see? What type of tests should we run? She is not pregnant, although she is on birth control pills for six months. She says she is not experiencing side effects from the pills. She takes no other medication. She does not have an eating disorder. I know she eats regularly, although she needs a little healthier diet. She is stretched then with high school, extracurricular activities and a part time job. She is a busy young lady but manages well. I have asked if she is feeling exhaustion. She gets tired, but doesn't feel like it is extreme. Emotionally stable. Mentally stable. Physically stable, except for above. Advice?

Should we go to the emergency room? Is this something we need to pursue immediately? Or can it wait for a regular appointment?