I am trying to stop PMO. But in 2 times I could be in without PMO about 3-4 days. In 3rd day I am getting remembered about previously watched video. That is happened when I watch TV, there was a girl and I am getting remembered that there was a girl like her in that previously watched porn video. I try my best to forget it. But it is really hard. That feeling is torturing my mind. When the urge is high, my heartbeat is increasing and feels like fever (sometimes body is shaking) because my mind want to watch that video and do PMO. I can't get attention to my studies and to any work. After do PMO I feel depressed about fapping. Then I can back to my works. I have already disabled Instagram and Facebook. I really want to get out from PMO. I really felt better in nofap days. Nofap days were the best days in my life. Please advice me.