Today at around 11:30 I took a shower and as soon as I got in there I got very lightheaded and dizzy and my vision was going black. My shower was the same temperature as it always is and I wasn’t in there long at all. I sat down on the floor and called my doctor and they said to sit down and drink a lot of water and eat something with protein and go into the ER if I’m not feeling better in 30 minutes. Well it’s been 3 hours and I thought it was getting better but I’m still getting dizzy and lightheaded when I stand up it’s not as bad as it was earlier but still there. Should I go in to get checked?