I’m in year 12 and this is my advice,
Just think you only have a couple months left of year 11 then you have ages off in the summer to do whatever you want ! If you work hard now and know you’ve tried your absolute best and couldn’t have done anymore then you will enjoy you summer if not your likely to spend your whole summer worrying about results day( like i did). You will regret giving up on the last push, you can do it ! Just keep imagining results day when you open your results, think what you want to see, get motivated from them because you don’t want a results day like I did( I cried(I still got good grades just not what I wanted))
2 months of your life now to get a food start in the rest of your life. 2 months out of at least 40 years surly it’s worth it.
However dont get to stressed, GCSEs arnt everything(unless you wanna go oxbridge) as limg as you get the grades you need for your courses and to get into sixth form or collage then your be fine. You won’t realise how easy GCSEs are until you do a levels. Enjoy GCSEs while you can and work hard now and maybe don’t go out all of Easter and weekends because yours have all of summer to do that !
Good luck In all your exams i hope you smash them and just remember it’s not the end of the world but you summer will be much more enjoyable if you work hard now knowing you did the most you could.