Shark, if your always tired, you shouldnt be afraid to take a few days off, even if it's mid cycle. I've taken a week off during week 6 of Sust, Deca, and the end of Dbol and bounced right back when I got back to the gym. I had all that Test running around my system with nothing to do and when I asked it to get busy.... BAM!!!! I started growing like a weed!