When ever I sit down to study , I get panic attacks. Please help

So hi.a little backstory I Haven't been writing posts like this for a year. So it has been 3 years that I have been trying to get into medical school. And I didn't. I couldn't prepare myself enough for the first time and after that bitter failure I genuinely became scared of studying. Like I got panic attacks when ever I sat down to study so for 2 years I was just stuck in my bed . It was a dark time. And well I still couldn't get into medical school obviously so I have tried to get into English language and literature and thanks to studying English since 7 , I got into university . One of the good ones in my country with a free education. I have tried to bring myself out of that depression state. Thought at least I like this major. I mean it is better than those dark times. Really dark.

And I am the top of my class. I even tried for jobs and got 2. And it is summer. My mental health has been better. I am thinking of maybe trying for medical school again and if I pass the entrance exam next year, I drop out of English major and enter med school. Anyways

My issue now is that I have planned such great plans for my summer....to exercise and go to park . To work on my English language more. To read books and novels that I like. To keep my body and mind and house clean and healthy. To study for entrance exam .

And yet I am again stuck. I sit behind the desk and my focus leaves me after 5 minutes . And I feel that panic attack again. It is ridiculous. I feel I can never be fixed. Even during semester whenever I had an exam, I couldn't study for it ...and all my high Scores are a result of a hellish night if no food and sleep.

I need help. Please