Ah, looks like I'm not the only 23 year old here. I feel very tired, but I do get enough sleep if you consider 5-6 hours enough sleep for a 23 year old. But I feel sleepy during the day and I feel overcome with the urge to sleep, for instance, I'll be doing work in class or something and I'll feel so sleepy all of a sudden. And no matter how much I try to fight that sleepiness I still feel sleepy and sometimes without meaning to I just fall asleep or something then and there. And I'll wake up and be like, "wait. what just happened?!" I don't remember what happens right before I fall asleep.
And a few times it happened to me while I was writing final Exams. I was writing my Exams and started feeling sleepy. Then suddenly I fell asleep and woke up with my head on my desk and confused. Why does this happen to me? I hate that this happens to me. I mean, it shouldn't be happening to me during Exams, let alone classes and at work. Advice? Anything? Thanks.