Healthy Energy Boosters

Hello, I am currently 7w and 4 days pregnant with my rainbow baby # 2. As well as coming up on finals, but I have been feeling beyond exhausted like I all my energy has been sucked out. With finals I usually survive off 4 shots of espresso over ice to study. But now that its limited and I def cannot be that extreme I want to find alternatives. Is there anything you have done to help with energy? I have three weeks of school left until graduation and sleep needs to be deprived off in order to study! Anything I can drink to help? Any suggestions would be awesome! Thank you so much ❤️