I went through the same thing last winter so i know exactly what you mean. it was after almost the exact same number of days (215), I had gottem 'burnt out" and complacent after the initial high of my first long streak. I was getting progressively "slippier", starting to search out "borderline" websites and such, and getting lax in guarding my eyes and thoughts. eventually I encountered a strong trigger and it was too much. i didn't actually fall "all the way" (i.e. no mz"l), but i got really close. it's not clear in the rules that that's a fall, but after I did it twice, i knew that if i don't say it's a fall I will not stop there, and I will end up falling all the way. So I called it a fall and reset the count. even though it made me feel like I "lost the days", which of course we haven't, at the same time it drew a line in the sand. Ad Kan, it's over, now get up and start with a clean slate.
And the same thing happened again 60 days later, i again got into a rut, and slipped ito looking at borderline p***. And again, i could have rationalized and gotten away with it, but i knew that if i dont make myself feel like i've hit a bottom, i won't bounce back up.
the important thing is to turn the fall into a positive experience, by figuring out what went wrong, and what changes we can make in our attitudes and behaviors to avoid a repeat.
In closing, in the immortal words of our sorely missed Bardichev:
FELL SHMELL!!!!!
KEEEP ON TRUKKKKING!!!!!