For the past 3 to 6 months, i have been having daily minor giddiness and lightheaded - but not to the point of losing my balance. I am able to do 100% of my day to day basis, however, due to its daily presence (of minor giddiness and lightheaded), it makes me very worried. What could it be and what type of doctor should i see?
Welcome to Chat Doctor! After reading your question it comes out that you are having some giddiness and lightheaded less from past 3-6 months, but it is not affecting your life. Had I been at your place I think I would meet a general physician or medicine specialist?  To me, it appears to be either some blood pressure problem or may be a case of cervical spondylosis. Getting your routine tests and BP checked will rule put some usual causes. You are right in finding for its cause as even though this is not disturbing you life, but this is a symptom, and it should not be there. Anyway, it looks to be only some minor problem, so donor worry a lot, see a doctor. Only after examining you one can pinpoint the reason. Hope the reply is usefulness free to ask more questions