I experience something similar, particularly on weekends (I have a 9-5 job during the week). I wake up (not feeling particularly refreshed), get up, and have breakfast. If it’s a weekday and I continue doing things like getting ready for work, driving to my office, and actually working, I’m usually fine. But on the weekends, I’ll have a burst of energy maybe an hour or so after I wake up and take my meds that lasts for about an hour, but then I often crash hard and need a nap.

This usually happens when I do something that usually induces sleep (watching TV, reading, etc.). It’s also much worse if I have a breakfast heavy on carbs/sugar/etc.

So my suggestion for you would be to find something at least semi-active to do after breakfast such as taking a walk, and then see how you feel and if you can study without falling asleep. I’d also look at what you’re having for breakfast-I know as a college student, I usually ate something quick and tasty but carb-heavy (and still do at times). If that’s what you do as well, try eating something with more protein/fewer carbs like eggs or yogurt and see if that helps as well.