My best streak is 70 days, i relapsed because i didn't see any progress, i still suffered from severe anxiety and depression, Now i feel i don't have the power to start again, because i think i might not feel better. I just feel like a lazy piece of shit now, i know i need to quit pmo again, but i can't get myself to it.
It may take up to 2 years, depending on the severity of your problems : http://www.yourbrainonporn.com/long-way-being-healed-definitely-improved 90 days isn't the end for everyone
I've starting feeling better after the first week. My cases of depression and social anxiety are medium. Everybody is different there is no defined answer. But like Frankied, as soon as a relapse happens the good feeling goes away very quickly, especially if a binge starts.