im looking for a pre-workout supplement that contains no caffeine or creatine. i work nights, so i workout when i wak up (5pm) or when i get home (7am). these are the times when i lift, so im tired each time i workout. i cant have caffeine cause i workout before i got to bed sometimes and i dont want creatine cause i already have it. i found pre-max in searches, but that s*** is expensive.