It sucks but its not the end of the world, you won't instantly loose all the progress you made during your streak, because reducing the ammount of porn consumption and masterbation has a net positive in your life regardless of if you break your streak once or twice a week (this could be subject to serverity or specific person to person but the general point still stands). What I mean is, don't give up no fap because you can't do a streak longer than a week because going from masterbation once or twice a day to once or twice a week is a huge improvement numerically and you will still benefit, despite cold turkey being ideal and the long term goal.

Even if you can only cut down to masterbation every other day, you have allready succeeded in reducing your consumption by half! That's significant and you should allow this to motivate you!

Hopefully this helps someone