Only thing that works, is a fixed daily routine to study, even 10 minutes with 3 minutes break or just even 5 minutes of studying. Follow the routine daily, even if it feels hopeless or its just a day before the exam. Doesnot matter if you dont remember anything you study or you make many mistakes even in a easy question, just continue daily. Start with easy sure questions and move on to hard ones. revise time to time. Anyhow prepare 60 marks. Make it your default activity. When you start, you will optimise the plan later. Forcefully study, you arenot ever going to feel completely calm or ready enough to study. Starting is the biggest hurdle. Years will be wasted and there will be the same guilt, regret and negative anxious thoughts beating you mentally. Study in a library where there are other people studying, be it in your college or somewhere else, or you would not know when years have passed in your room. Also, if you always feel negative and hopeless, stop jerking off or watching porn daily. At least make it once a week thing. Study one subject at a time, give 2-3 days more than what you think will be needed. Planning to study two subjects at the same time, not possible, when you study, another subject is going to be in your mind. If you fked up one subject, move on and try your best to pass another. Download resources and stop staying online, buy a keypad phone. Stop trying to limit or control your social media use, gaming or porn, its not possible for you. If you had problems with overuse, or used it as a escape from anxiety, even a glimpse will take you back to same old routine loops. Not Everyone will say do this and you will start clearing backs, most people want you to praise them for doing so. Hope this helps.