how to not think about anything while studying?? how to gain proper focus and only think about exams??

i live in my parents house and everyone has something to say, another day another thing happens and i am not being able to concentrate and focus enough and my exams are also approaching too fast.

i am panicking, just 20 f days. i want my exams to go perfectly but idk why i think about future or what i could have done in my past.

i have so much to cover up, 5 mins i will completely lock in then for 30 mins i will start researching about something random. i mean its everything that’s been distracting me rn, dk how to build concentration focus for this exam.

also pls dont tell me to go study outside, it’s impossible T_T