Always exhausted, tired of being late or missing class because of it

I am very tired all of the time. On a good day, I wake up and generally am fine. By the time I get to my class, it feels like all the energy I had is zapped. When I eat or drink coffee, some of it comes back but I end up crashing again. On the average day, I am showing up to class on time or a couple of minutes late.

It feels like I am struggling to get through my day-to-day and I stuggle even more just to get up in the morning for class. The other day, I fully missed an exam. I can't even make myself show up to my 9:30 math class (which I struggle with) even though I wake up every morning to go to it. I just can't force myself to move. I don't really know how to help myself when it comes to energy or how to make myself go to class when I feel so exhausted.