fainted 3 times in 2 months 19m non smoker no medication or illness

I know I probably should see a doc but I’m an exchange student I would really like to avoid it I fainted 3 times since september, got told it was a vasovagal response, and to drink electrolytes I’m doing that I still don’t think it’s working it doesn’t really happen in specific situations and not when I workout I usually get hot nauseous and dizzy then nothing if yall have explanations/tips Im really open to