Hello and welcome to HCM. Thank you for your query. The fact that you have been experiencing dizziness for this long, does suggest you could be suffering from vertigo. The most common form of vertigo is BPPV (benign paroxysmal positional vertigo). In this condition, crystals are former in the semi-circular canal, which result in nystagmus (movement of the eye in the fashion the examiner described), vertigo (dizziness) in certain positions, etc. The mainstay treatment for BPPV is the Epley maneuver. This maneuver is a very tricky one, and can only be performed by an experienced and well-trained individual; through which the crystals are removed out from their current location. This might take more than one attempt, so yes, this can be repeated, and must be repeated till all the crystals can be removed. The Epley maneuver is designed in such a way, that the crystals should be expelled, but as this can vary from person-to-person, we cannot be completely sure whether they were expelled or not. What most therapists do is, to wait and watch if the patients complaints subside within 24 hours, and if the patient reports to him/her again, the first attempt was not completely sucessful. The dizziness will almost completely disappear immediately, provided your diagnosis of BPPV is accurate (and the cause for your vertigo) and the crystals are successfully expelled. In the meantime, you can request for medication, which patients with vertigo are usually treated (eg. betahistine hydrochloride). Please also make sure you do not make any swift head movements, and be slow while changing positions (supine to seated, standing to seated, etc.). I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://doctor.healthcaremagic.com/doctors/dr-shoaib-khan/64581 . I would gladly help you. Best wishes.