Straight A student to F- HELP!! (Procrastination rant)

Rant on what led me here (and to reflect and complain):
Last year, results came in I got all A's, I genuinely didn't study much as I should've but at least I was your average good student, I could listen at class and hand in homework before due, all that, maybe i put my guard down?
I started slacking and procrastinated every time I came back from school and would spend hours after midnight to do the homework I should've done days ago or the afternoon, this varied from 1:40-3AM and then in class either i would be daydreaming or struggling to stay awake. I would doze off (i don't know how) sitting upright so I didn't get caught often.
I don't know why I did this,I'm slow and naturally if course got harder, I needed to up my game and yet knowing this I didn't, my mock tests were almost all F, And when exams came rolling by was when I really started doing some work but again I still would procrastinate, the day before each exam I would stay up to 4 and wake up at 6 and function on Redbull and do so much notes in order to store more in my short term memory. I legit wrote down the entire biology course in the course of like 6 hours,two exams clashed and I had to take them at the same day in two different schools so i had no extra time to study between them, everything was all so stressful.
With all that I passed all my exams,one being 3 marks off an A, an A on a language i already fluent in, B's and C's. It scares me that I had to put myself through all that torture to achieve those, I would've failed all of them, and if I didn't start off like this I probably could've gotten so much better, I cant even estimate because I've never seen my full potential.
During this time I realised it had been so long since I locked in ,I genuinely forgotten the feeling of studying for hours, the sense of accomplishment after racing through past papers,was refreshing almost, I really want to become that student I used to be.
Its like I'm falling back to the cycle again; back from school, procrastinate or nap, do homework at the AM , go to school, doze off lessons, didn't learn crap,repeat.
but it can get worse somehow,on average this month in particular I'm sleeping at 4 and waking up at just enough time to run to school. Summer barely ended and I've already failed a chemistry test and literally went back to last year exam mode to pass a physics topic exam. I don't want this to become a new habit,I want to do well and live like a human.
This year subjects are definitely more harder genuinely i cannot pull another short term memory thing i did last year, for this year. I will fail.
I've ruined my sleep schedule, my punctuality, development and I'm not even an adult yet :C
(Rant end)
Anywayss I told myself that this year I was locking in however it seems its not going to happen so I need some help.
My procrastination consists of napping, scrolling, drawing, music and on the web ;
I would continuously scroll on social media ,get agitated because I'm supposed to do work,set timers of 5 or 0, move to computer, listen to music while doing work, choose music, look at artist profile, linked to their Instagram, scroll, get agitated, cycle repeats, lose a snapstreak because I'm barely on my phone because I blocked everything, take timer off snapchat, scroll snapchat spotlight, as expected its brainrot and not entertaining and I've wasted time and i block it again then cycle repeats.
or I'd be researching something and then through internal links land myself reading articles of a somewhat unrelated topic.( last time it was deep sea gigantism on Wikipedia )
For my computer I set up this extension so I can block Instagram and ill block TikTok too,and its the only thing working but then after blocking these id still find a way to start the cycle excluding social media on my computer.
I'm so lost I don't know what to do as I keep telling myself to lock in but never do. I watched some videos,but procrastinated on the decision of watching a ted talk on procrastination itself, I need some help, what can I do for procrastination and staying focused? I need some tips based on my situation or in general, anything helps.
Procrastination will be the death of me, literally.
Thank you in advance!!!