Creatine is tricky, the best results I have experienced is by LOADING it, by that I mean you take 5grams 3X/day for 10 days, 5/grams/2Xday for 10 days, then 1X/day for the next 30 days.
The only problem is stomach aches, since your suckin up a bunch of sand, it takes a toll on my stomach as well as others, anal leakage is not good, if so slow down ingestion.
Are you really 5'8" and 120 lbs? I hope that is a typo, or you look and eat like a crackhead and creatine is NO substitute for a good diet and strong, solid foundation.
Creatine is also best absorbed when taken with a Sugar, squirt of honey or whatever.
Water retention is a weird side effect cause your watch fits differently and your shoes to be tight, some people like to take with dieretics.
I fish LA twice a year for 100-200 lb tunas, you guys have great food as well as 2 super freaks- garry Frank and Jesse Kellum who run various clinics throughout the year, try to find them for consulting on various issues will help you immensely.