I am a college student and am having a very hard time focusing in class and on my tasks. ?

Time for evaluation: People perform at their best when they get adequate sleep, have proper nutrition, are free from illness &work in a comfortable environment. You need to write down any and all symptoms you have, time they started, things you have tried, etc. & schedule an evaluation with your doc. A sleep study may be indicated as would blood tests & a physical. That visit can begin your path to success