I've got exams this Monday and my biggest anxiety is not being able to concentrate in the exams. Lately the heat has been affecting my revision greatly as I'm struggling to focus and feeling sleepier and I'm worried the same will happen during the exam, causing me to fail my exam. My first exam is Edexcel RE so I'd be constantly writing and writing during the exam and won't have much time to think of points so I need to be sharp and focused but if the heat gets to me then I'll have no chance of doing it. Do you have any advice for what to do?