Need help

I am 21 years old and living in my apartment alone for study purposes, it's getting hard for me to get rid of porn now, my exams are going on and it's hard for me to focus I first have to watch porn and masturbate to gain focus, I am wasting too much time on it, please suggest me something what should I do? I tried too many things meditation, reading, and cold showers but most of the time the urge comes when I am studying, and it gets hard for me to control, that time I feel that I have to focus so I must do it and then I feel bad so bad. Please help me guys suggest what I should do to eliminate this problem.