What would cause some recent symptoms of lightheadedness, lack of concentration, migraines, hotflashes, & getting tired out really quickly. Im 22 never been so tired out in my life, it makes me breathe heavy, I get nausious mostly when I get too hot from a hotflash, I got dizzy one time last week but these symptoms have occured almost daily for at least the past 2 weeks. Ive never had anything like this except the occasional migraines or headaches that come from my head being pretty out of place. But they all seem to be frequent. What do u think it could be?