Bless you!!! I wish I could just come and hug you
I've been there, I had/have anxiety! But just keep at it! Grades are not everything, obviously try and work hard but don't let you it have a negative effect on your health, your health is so so important!
I got rejected from my 5 universities and i really lost motivation but my teachers really supported me and helped me to keep at it! (Here I am today, beginning the course of my dreams!)
As for time and organisation, I had a to do list on my phone and like little reminders. Just starting with like 1 task like getting through a past paper for the day, and then when I completed that task in the day i felt so happy so would then slowly add a few more things for the next days to do list.
I couldn't and still cannot stand mess!!! I try and keep everything clean beforehand so like before going to bed and in the morning And afternoon when I need something I make sure I put things back where I got them from that way i know i wont have to waste more time cleaning up all the mess later , so it's easier to clean things up as you go along rather than have a whole lot of stuff piled up for later!
Do you have a school counsellor whom you can speak to in regards to your depression and how it results in you lacking motivation?
Or speak to a trustworthy teacher, they will be able to help you! The worst thing to do is not tell anyone because then it can end up affecting your achievement.
You got this, you can do it! Noone else is going to do it for you, it's only you, your health is in your hands, you get the help you need, it's all out there you just have to take the first step and ask for it!
Thankfully for me, after speaking to a trustworthy teacher she referred me to the school counsellor and encouraged me to go! That was during March time, after I had been rejected, my biggest regret was not going to the counsellor and asking for help earlier
So don't make the mistake I did and leave it last minute, speak to someone at school. They'll guide you in the right direction
I wish you all the very best
If you want to chat more, my pm is always open!
Also, I did Chemistry Alevel too, wasn't my best subject, I have to say