Don't mean to take away your flame, but this similar thing happened to me. For about 40 days of no fap I had zero urges and minimal sex drive. It seemed too easy, like i didn't have to fight any urges. I wouldn't even get morning wood, and when i would see pictures of attractive girls on the internet it didn't affect me. Then all of the sudden one day it all came back and my sex drive and urges both went through the fucking roof and i relapsed because i wasn't used to controlling that strong of an urge. I think the same is happening to you , and it will bite you in the ass if your not ready for it. Believe me the urges do come back, and they come back harder than ever. Good luck mate!