pls help i cannot think or do anything

so basically I have finished my high school and I am pursuing medical field (mbbs) and have to give a entrance test in 59 day.but I am experiencing the worst anxiety that I have faced uptill now I was typically a strong minded person who had never faced anxiety or depression in my life but something changed in corona days I had my first ever panic attack in those days and after that I was generally fine with little to no stress related to exams because I was doing well in them. in Pakistan we call 11th and 12th standard college and have to give state mandated exam in the end of it. In my 10 standard I had given a state mandated exam in which I scored 80 percent which was enough for me to get into a great college. uptill now my mental health was at its peak no stress no anxiety only good thoughts but when my 11th exam results were announced I got to know that I had scored only 73percent which is terrible and was almost lowest in the my friend group which completely shattered my heart and my confidence I went through a very rough patch and went into a slight depressive state which I could not brush off .now in may I just gave my 12 exam and I worked very hard in preparation and gave my best pulling all nighters studying 14-15hrs a day but It gave me terrible anxiety putting me in a state of question that is this enough will I score high will my score be enough to get a high merit as medical school is very expensive and seats which are subsidized by country are very limited. I spent the whole of June in depression and had a constant noise In my head to kill myself as if I can't pursue my dream then I am no use to myself or my parents and even with the subsidized seats it will cost my parents upwards of 2000000 rupees and I don't wanna waste that I wanna become a doctor but I can't make myself study for the MCAT due to my anxiety it's reached to a point that I can't even eat anymore and just today I only had breakfast and nothing else the whole day I lay down in my bed and scroll through social media platform to take my mind off this but I still wanna study to get good grades. ( sorry if in-between my sentence structure did not make sense as English is not my first language)