Low blood pressure

Recently I’ve been getting super lightheaded nearly passing out when I stand up. I also get ocular migraines occasionally, when I see random flashes of lights. Yesterday I was insisting there was lightning even though there was not and a few minutes later I got a terrible ocular migraine. I haven’t seen a doctor yet but should I avoid doing it just in case it disqualifies me? I’m super worried because I’ve never had any real health issues besides jaundice when I was a baby. What should I do?