What Causes Dizzy Spells, Fatigue And Vertigo?

early 40s, 3 dizzy spells last year, 1 last month....drink lots of caffeine...stay up late...seems to happen when getting up or if there is a pattern that my eyes see (bricks, etc...)...then vertigo...saw NP said no worries but to see opthamalogist...I can feel muddleheaded too sometimes/fatigued....never happened before last year