hi
i had a similar situation where some of my grades were lower than what i was expecting, and i think the best thing i did for myself was realise GCSEs don’t matter, like at all. some elite uni courses (medicine, oxbridge etc) will judge based on GCSE results, but the majority don’t care as long as you’ve got a 5 in maths and English, any other grades are just like bonuses. think of GCSEs as stepping stones, you’ll do a levels/ btecs, and by the time you leave college GCSEs will be redundant, as you have a higher qualification. also, remember that no matter how much you stress about it, there’s nothing you can do to change it, so you’ll be much better off putting it to the back of your mind and focusing on what comes next, or any hobbies/ sports you enjoy.
moving forward, id recommend spending time trying different learning methods (e.g. visual, kinetic, audio) and different environments (at home or out, with music or not) so you can fine tune your revision methods, it’s all about what works for you, but even more than that it’s about looking after yourself and balance. There’s no use in working to the extent of burnout, so make sure to take time out of studying for relaxing things, maybe try a new hobby, watch some tv or spend time with family and friends
hope this helps you out, feel free to reply/ pm if you want to chat more,
C