Fainting episodes

[Thrashyy]

Over the past 3 months I'd say, I have had fainting episodes twice now.

The first time I had fainted, I had no clue it was going to happen when I woke up. I had got dressed, went to my bus stop and went to school. I had got my lunch feeling fine, went to class and begun eating. Before I could even finish my stomach was killing me, it felt kind of empty and generally uncomfortable. Shortly after that I started feeling nauseous and it was pretty intense, I put my head down thinking it will make it better but as soon as I closed my eyes my lights went out, I passed out and had hit my eye on the desk and needed to get a cut glued shut from the fall. After it I was totally confused at what happened and didn't realize I fainted or even hit my eye until the person next to me told me I was bleeding.

And today, I was on my way to court with my mom due to missing too much school for the same health reasons, and we stopped at Wendys. As soon as I got my hamburger I ate probably about half of it before my stomach started hurting out of no where, I had no thoughts I'd be passing out. I felt like I was going to puke so I asked my mom if my face looked pale and she said no, then I kind of went blank and felt faint, my vision started going really suddenly like everything was morphing and going black, I had said "mom my visions starting to get bad" and passed out right after I put my hands over my eyes, afterwards she told me after I said that she looked over at me and I was already passed out and twitching while I dropped my drink all over me, I woke up and was unaware I just fainted but still felt woozy and confused with everything, I had told her I am not going in the court room and she said she'll just go in and that was the end of it. but still, I am unaware of the causes? Can anyone share some information that might help or anything, please and thank you, it is pretty scary for me.