just put ur mobile away and focus as much as u can
Don't Regret now!! it's ok! you can't change anything now! so you should utilise your remaining time wisely.. and i case you won't make it in your exams than don't worry and try again but this time you should concentrate and put all your best!! Don't Panic now!! Calm yourself and don't overthink!! Stay focused for rest of your time!!! All the Best!! 😊 Happy Sunday!
For restricting your mobile use, there is an amazing app "Yeolpumta", you can use it to increase concentration, block the use of every app other than study app
Study for 18-19 hrs daily, so 1 day study will give you output of 2.5 days that means u will cover portion of around 18 days in 7 days. Nothing is impossible it's just u hve to work hard for it.