Going to secondary school and I was a fainter - didn't know I had a condition that was causing it at the time and because my MH problems appeared at the same time scale it was put down to that oh and hormones
I went thru a battery of tests at the time and the condition which was causing it wasn't picked up on but having sat down with consultants years later and gone back over history and got notes from the earlier hospitals it all makes sense now
This went on for over 3 years and then I left school and it slowed down a bit, it hit again in my late 20s and was finally diagnosed for what it is in mid-30s
On school mornings, I had 2/3 sausages, 2/3 slices of bacon, potato farl, fried egg, 1/2 tin of beans and about 4 slices of toast, washed down with about a litre of orange juice with it -
This was the late 1980s so the microwave was in full use - while I had my evening meal on Sunday evening and enough was cooked to do until Wednesday morning and on Wednesday evening, while I had evening meal I repeated the process for Thursday / Friday
The sausages were cooked on Sunday / Wednesday evening - the bacon the same - the potato farls were popped in the toaster while the breakfast was on the plate in the microwave - the fried egg for Mon/Tues/Wed morning was cooked on Sunday evening and was fine - prick with a fork and onto plate in microwave - 1/2 tin of beans onto plate as well,
The rest went into Tupperware (something useful from the party years) which was what was used to separate all the bits in the fridge - while it all was in the microwave for 5 mins, the potato farls took 2 mins and the other slots of the toaster was used for toast, while micro was on and toaster going I set the table and got a glass out and sat down and ate
Despite me definitely not being hungry and still having a snack for morning break (usually home-baked bread with ham/cheese) and a packed lunch and money to get chips if I wanted, I was still fainting here there and everywhere. My whole year all were excellent at putting me in the recovery position or helping move me out of a packed corridor or occasionally being a buffer between me and something as I went down.
If I made it to school it was a good day as often I didn't as friends would pick me up from the ground while on way to bus, on the bus, in assembly, in class, falling up and down the stairs (it was a 3 storey building and crossing the road to the other campus) - I was taken to the office and mum was phoned to collect me once it had happened 4 times in the day
it didn't make any difference re sugar levels, what I ate, I tried not eating as well to see if there was a difference, there wasn't
So would say a trip to the GP to rule out any conditions that are underlying and go from there - good luck