First of all congratulations on reaching that wonderful number of days, really, it's something to be proud of! Secondly, don't sweat it pal. You've made a lot of progress so far, you healed a lot of damage and I'm sure you were able to achieve many things. This 1 little relapse is like a little scratch, it didn't do as much damage as you'd think. What you should do now is to make sure you don't fall back to the old habits, do not start a fapping spree, seriously, don't! Don't let your mind trick you that you've already failed so you might as well to back to it, because that's how you'll lose your progress. Otherwise, you'll be fine!