Sree Sree Guru Gaurangau Jayatah!
There is one illustration in Srimad Bhagavat that Sree Yayati Maharaj could not satisfy his sexual lust even by prolonging his youth for one thousand years by getting the young age from his youngest son Puru. He came to sense after one thousand years that he took a wrong procedure and ultimately gave up completely the appetite for sexual pleasure. He declared "na jatu kamah kamanam upobhogena shamyati havisha krishna-vartmeva bhuya evabhivardhte." If anybody goes on pouring ghee (clarified butter) to the fire, that fire will go on increasing. In the like manner, if we go on giving impetus to sexual pleasure, it will go on increasing and we will not be delivered from this evil propensity. Our Most Revered Gurudev used to advise us by giving the example, if a huge amount of ghee, say 1000 kg of ghee, is poured on the fire, the fire will be extinguished. The only way of extinguishing the desire of sexual pleasure and other desires is to have extreme longing of getting Supreme Lord who is Absolute and Complete Reality. But to get this extreme desire for realization of God-relation, association with bona fide devotee Sadhu is absolutely necessary. In case of not getting the association of bona fide Sadhus physically, the only other way is to go on praying the grace of realized souls like our Most Revered Gurudeva, Most Revered Paramgurudeva, other Guru-Vargas, Six Goswamis and such established realized souls. The Personal Associates of Supreme Lord may appear anytime anywhere to rescue the fallen souls if it is sincerely prayed for.
Further, I think you are repeating four Narasimha Mantras at least each mantra four times, and after that Pancha-tattva and Mahamantra four times, while going to bed in the night and rising up in the morning. You will get immediate effect if you utter those mantras without doing silently, mentally. If loud utterance is not possible at least you should utter those mantras by uttering with less sound. The Transcendental sound of utterance of Holy Names can remove pollution of material sounds.
--- Jagad-guru His Divine Grace Srila Bhakti Ballabh Tirtha Goswami Maharaj