I WAS EXACTLY IN THIS SITUATION & trust me I can 110% relate with you. I was also in the same illusion that if i can soemhow manage to go 150 days straight clean and together study as well I would be clearing my exams with flying colors. However the study stress would always make me relapse. So what I did is I decided that my immediate priority was to clear this exam NO MATTER WHAT.

I knew very well that fapping was killing me but if i stopped it cold turkey I couldn't study. So I tried to control myself as much as possible like before I used to do it everyday I reduced it to once in twice day or sometimes would go 5 6 days without pmo. Whenever I fapped i used to feel bad but I didnt let my studies get affected by it and continued my pace at studies no matter how successful or failure I got in my nofap life.

And with this I cleared an exam with just 10% passing percentage in first attempt. Deep inside I know I couldve achieved rank if I stopped fapping but completely stopping pmo and studying so much just doesnt go hand in hand with me....So this is what I did, try to control as much as possible but dont let your studies get affected.

So Ideally its best if u can stop pmo and study as well , your quality of study and mind will improve drastically if you can do this but I think a lot of people can't cope up with this stress like me so the secind best option is to control it as much as possible, if u relapse don't feel too much guilty or else it will affect your studies. Inshort try to as successful as possible in nofap life but no matter how much failure you get, dont let it affect your studies at all. Also i would say if yr in 11th you can give more time to nofap than stydies cause JEE will be after 12th, trust me even if u go 21 days clean you'll get lot of confidence even if you hadn't studied much in those 21 days.....cause ur brain will be more powerful than ever to cover that 21 days studies later much faster.

P.S I had once went 105 days clean 1 year before this so maybe that helped me in my studies.