So I've been doing my exercises for about two and a half weeks now. I started off on a two days on/one day off split, but then I switched it to one day on/one day off as per the Exercising your Penis e-book. I believe I measured my girth to be 5.1" when I started, but when I checked recently, it's 5.0" clean. However, I do not believe I overtrained at any point (always healthy body clues - stronger erections than before, no bruising/numbing, morning wood, slightly longer flaccid now).
Is it possible for a regression to occur before the actual gains start coming in?