I have got a constructive piece of advice for those individuals currently revising for their gcse. There are plenty of students at the moment crying about the stress of gcse .I was in the same position as you guys i really thought i was going to fail all my gcse at this time of the year, but i realized that gcse is not even that bad. The jump from gcse to A level is quite significant but now when i look back at the gcse books i wonder why i was even stressing .The key concept which you need to store in your head is achieving good grades but that needs a little hard work .If you have an assumption of gcse being hard you're not going to reach your potential is all about positive thinking you will realize how easy gcse really is when you're studying A levels.Through this mentality i managed to achieve 10 A*.This requires work but you need to know anything is achievable if you have a doubt in getting the best grade you will achieve poor grades its all about having a positive mindset. Trust me you can do it
Good luck