Me and my friend after contemplating for a long time started a challenge called no fap where we don't masturbate or watch meaningless porn, masturbation or orgasm for 3 months, intried doing this for 2-3 times and I have failed and masturbated within 1-2 weeks, this time I was motivated to complete at least till 3 months, I had some night falls during sleep which in anyways is not counted as pmo, after few weeks I'm not able to get a proper erection even though I tried to have sex with a girl, I want to know what problem am I facing?