If you're in my Year 11 class right now, you'll know that we've just had a grim taste of reality when looking at the calendar and realising there are 8 school weeks left until our exams. Inevitably, as teachers, we then roll out the tired cliches of "it goes by so quick," "you'll wish you'd revised sooner/done more," and "you need to have a sense of urgency now!!"
All of these things are true and in an ideal world you'd all be robotic and be sat in your rooms every night, going over exam questions, comparing yourself to mark schemes, highlighting your weak areas and addressing them with revision. But you're not, you're human and this means you have a social life, other subjects to worry about and pressure coming out of your ears.
So how do you cope?
Simple - Little, effective and often. Make the most of your time and your stress will reduce as you gain confidence and realise you're becoming more and more prepared.
Apparently, it takes two weeks to form a habit, meaning you stop thinking of ways to get out of something or making up excuses and just get on with it instead, which indeed means there is still time to do the right thing.
Here's what I'd do:
The principles are really, really simple. The question is, how motivated are you to take control of your own exam destiny? The bottom line is this, all you need to do is walk out of each exam knowing you did the best you could. This way, you'll be less stressed and confident in doing well. If you know you could've done better, that will stick with you and nag at you for some time.
Don't waste the wonderful opportunities you have right now.