I need advice

I need help. I have exams next week and I NEED to stay awake. What can I take to stay up? I’ve been told ADHD pills (it’s like speed) but my boyfriend won’t let me. I’m so stressed and I need to study but I keep falling asleep. Ik I need sleep but I need to study. I can NOT fail. If I fail I’m getting pulled from my current school and getting put somewhere else. Please give me advice on what I can do or what I can take to stay awake! Please help!