question: Everytime I stand up, either I was laying down or sitting down, I get really lightheaded, and my vision goes black. I have to lean against the wall till it passes. It happens ALL THE TIME. It doesn t matter if I get up really slowly or not, it happens. I ll even sit for awhile before I get up to try to prevent it and I ll get up ridiculously slowly but it still happens. This has been going on for about 2-3 months now, every single day. Sometimes when I m laying down it ll happen too, I m just lying there and all of a sudden I m really dizzy. Also it doesn t matter how much sleep I get, I m tired all the time. Im a 23 year old female, I work out regularly, I have struggled with depression and anxiety in the past, but other then that I m pretty much healthy.