Dizziness

Georgia
Kay so all day I've been dizzy as fuck. Like, if I move too fast I get light headed and my eyes do this weird thing. It could be that I didn't have any water till right now, which is nearly 4p.m. But my dehydration isn't usually this bad. Does it mean anything that I'll be on my period in 3 days? This isn't a sign of pregnancy is it?