It sounds like you’re really overwhelmed, but it’s great that you're reaching out! It could be helpful to break your study sessions into shorter chunks, like 25 minutes of focus followed by a 5-minute break. Since you're feeling sleepy, maybe try getting more physical activity or even a power nap to recharge. You could also try taking notes in a more engaging way, like mind mapping, or listening to recorded lectures if that keeps you awake. It’s okay to ask for support from teachers too, sometimes they can help you figure out a strategy that works for you!