Dizzy all the time

Lately, I get dizzy easily. Like when i bend down just to pick up something or if I stand too long.

Checked my pressure. Seems ok.

Hubby thinks it is attributed to the late nights on the computer...

Maybe he is right...maybe he is wrong...not sure.

Probably not living a healthy lifestyle. Haven't exercised since like I can't even remember. Sometimes just walking up the stairs makes me breathless.