Should I see a doctor?!
Question: Should I see a doctor?
Answers:
Are you getting enough to eat? You're not on one of those crazy diets are you?
Have you started taking a new medication? (I had surgery 6 weeks ago and am on pain killers, so everytime I lie down, the world whirls)
Half an hour is a very long time. You may have low sugar, low blood pressure - impossible to diagnose. I say YES - go see a doctor. And good luck to you.
Have you been eating well? Is there a possibility you could be pregnant? Have you suddenly begun a rigorous exercise routine? Have you been sleeping more than 6 hours? No matter what, still I suggest a doctor's appointment just to be sure...