Happening for YEARS

Sometimes when I’m standing. Everything will start to go dark and I can’t hear anything.. then I’ll pass out and fall down and start shaking but I’m aware of it happening while it happens. Then afterwards I have a headache/migraine.

I’ve wanted to go to the doctor before when I was younger but my mom never took me and said I need to drink more water 🙄🙄 which I know that’s not why... but anyways i don’t know what it could be and I do plan on seeing a doctor.. once I get medical insurance again since for some reason it stopped and I don’t have it... (county)

I don’t think it’s low blood sugar either because it can happen when I’ve recently ate..

Has anyone had this happen and get a diagnosis or figure out what it is??