low energy

I get the opposite effect. I get very low energy levels when fapping and very good ones when I haven't fapped for a couple of days. It might be related to not sleeping well...

 

It is possible that without PMO you have become more aware of your low energy. If you didn't sleep well the night before then that's the most likely cause of your low energy. Try paying more attention to your sleep schedule. Try to avoid a lot of physical activity (such as a workout) before bedtime as that will energize you and will make it hard to fall asleep later. Try to keep your room as dark, quiet, and comfortable as possible while falling asleep and only use your bed for sleep (or sex if you have someone over and aren't on hard mode) as you need your bed to remind you of sleep when the time comes to sleep. Hang in there!

 

I'm not sure, but in my experience I usually hit a brief flat line a little bit after a week of not jerking off. That's probably what you're going through and it's what I'm going through right now. Also, the whole point of not jerking off is to be able to feel completely different about life than when you do jerk off. There are higher highs and lower lows. Compounding your sexual energy just lets you be more aware of your moods. Like the quote in my signature says, you can't be more sensitive to pleasure without also becoming more sensitive to suffering.

Stay strong.