@gaboslastresort
Did you get a full iron panel blood test done? Since you are a young female, it would be good to check if iron deficient/anemic. I had heavy periods and mostly vegetarian and my bloodwork didn’t flag anything until they did a special iron panel which showed I was iron deficient. This affected oxygen levels in my blood and I felt lethargic and weak.
https://www.healthline.com/health/anemia/anemia-blood-test