Failed my 3 month no-fap today

From June, I took an oath to make myself strong by not watching porn and masterbating. For context, I'm extremely horny dude who destroyed his 2 years of JEE prep due to jerking 2-3 times everyday.

In June, I took an oath to stop watching porn and jerking. June July August September 12th, no fap.

Although in the last few days, I got bored and thoughts started coming in. And today, my hand gave into those thoughts. As I writing this, I've jerked 3 times today. But I want to stop, so I'm disabling reddit app and will use reddit through Chrome (which sucks to use). Someone please advise me how to stay away from this Virus and score good in Mains 1st attempt.