With what little experience under my belt . . . Yes. I have experienced the same thing. Don't be afraid to take a few days - week off. Your penis won't shrink. A lot of people have reported spectacular gains after taking a long hiatus, so it might be the ticket for you. Listen to your body and rest when you need it.
Also, I believe you have said before that you are pretty health conscious(i.e. - no performance enhancing drugs for weightlifting,etc.) and are "all-natural." Does that preclude you from trying cialis/viagra? I am a vegetarian, weightlifter and haven't taken any supplements besides creatine(tried for the first time a couple of months ago). However, I'm seriously thinking about trying viagra and cialis for both Penis Enlargement workouts and my psychological problem sustaining an erection when measuring girth. As soon as that tape hits my penis - bloopy - it goes flaccid. Crazy, funny and frustrating.
lol
My advice: Take a few days off, while still doing about 400 wet jelqs at medium intensity. The jelqs should help your circulation, are stimulating and should not be intense enough to violate your "rest." Or, you could just go a few days and not do ANY Penis Enlargement exercises. Either way, you'll learn if it works out for you (and your penis won't shrink - I PROMISE!).
Regards,
HOOSYODADDI