i wouldn't even be taking the creatine if I were you. Develop a solid natural base. If you are to take anything, take these:
Food
Food
Food
Lots of Water
Whey Protein
Casein Protein
Fast Digesting Weight Gainer (like IDS Smartgainer) for post workout
BCAA's
Sport Multivitamin
EFA's
No creatines, NO products, nothing, your test levels are extrememly high right now and will be until your about 21, wait until your about 18-19 (4-5 years of solid training and dieting under your belt) and then if you want to dabble in stuff like that, go ahead, but get your feet on the ground and running first before you start taking supplements (remember bodybuilding is about winning the war not the battle)You have a lot of time to get big, do it right and natural and you won't be dissapointed, there is no miracle supplement that will make you huge in a year or anything. Without diet and good training, efforts will be for nothing. Remember the word supplement, it means to supplement what your doing already, so if you don't have a good diet and gym routine, you are doing nothing but wasting your money.