my story..Please help

I would like to share my story..I am 22, male..and I have been masturbating since 14 and watching porn since 17..and I am a masochist (one who derives pleasure from pain-50 shades of grey kind) since maybe 8-9 (like I loved it when my female teachers used to spank me)..i know-messed up but I was born this way I guess..anyway so ever since I started masturbating, my fantasies were all based on being a submissive-getting dominated by a girl-bondage, spanking and what not..and I used to masturbate usually to only these fantasies..so obviously when I started watching p I watched mostly female domination p, sometimes vanilla, but it didnt give me the same pleasure..now 7 months ago I got hocd (where one gets intrusive thoughts and fear that he might be gay even when he knows he is straight) which I believe is porn induced-coz my porn kind of escalated from female domination handjob porn to strapon porn (woman penetrating man) and my hocd is really severe now..it has been 7 months of hell..I used to watch porn/masturbate w/o porn like everyday for like a year ..so to beat this hocd i decided to take up the 90 days NoFap challenge hard mode..i am on day 9 now..and surprisingly i have very little urges to watch porn/masturbate for these 9 days..which is making me anxious and my hocd strong and this also makes me think if i was really addicted to porn or not in the first place and if my hocd was even porn induced or not..u see i want my hocd to be porn induced so that i would like to believe that after i complete this challenge i would be hocd free..however hocd has hampered my libido really bad too..not easy to get aroused when u have so many intrusive thoughts in ur mind, so maybe thats why I dont get the urges..
anyway my point is-how many days does it take to have those urges or like the withdrawal symptoms of porn abstinence? ?

 

Thanks for ur reply..I will keep posting and be here and hopefully complete my 90 days challenge