Yep, it seems like you have a few misconceptions about these supplements.
First of all, "pure creatine" could actually be a few things. Creatine monohydrate, creatine ethyl ester etc. etc. They are all
supposed to do the same thing, but have different absorbtion rates. Provided what you have isn't in some way contaminated, it won't do you any harm what-so-ever. Creatine is supposed, at best, to do three things. First of all, creatine, in the form of creatine phosphate, is used in the muscles as a phosphate buffer allowing for rapid replenishment of ATP levels. Having more creatine phosphate in the muscles theoretically allows for a longer duration of high power output. Secondly, as creatine is actively transported into the muscles, it creates an osmotic gradient which causes more water to enter the muscle. This can cause the muscle the look bigger. Thirdly, because of effect two, more nutrients will enter the muscle which can help recovery etc.
Whey is just protein, albeit fast absorbing protein. So either take it post gym session to quickly get amino acids into your muscles for repair, or to generally up your daily protein intake.
But as morba says, sort your diet first and so some reading
