Lately when I ve been feeling really lethargic and light headed, when I ve been sitting down for a while then stand up I go really light headed and dizzy and feel like I m going to pass out, also I get like blind spots in my vision when this happens it was going on for around a month. I ve started drinking more water, eating healthier and working out, it has helped however if I have a lazy day it comes back. I told a friend and they suggested it may be my blood pressure.