Eye doctor says there's nothing wrong with my eyes physically but my vision still changes it's been real blurry and cloudy for a month now?

Blurry vision: Blurry vision can be due to: dry eyes (most common) {from a variety of causes, mgd, blepharitis}, need for new glasses (refractive error;induced myopia); diabetes, headaches/ migraines; rare issues (increased intracranial pressure/ papilledema, etc. Be sure you went to eyeMD, had full dilated exam, HVF, OCT, pupil check. If all normal, glucose check. I'd be happy to see you to find answer.