In one day?

Is it unusual to feel so much stronger after a single day of supplements?  I began taking protein, creatine, and mega vitamins yesterday and I was surprised at how much strength and energy I had during my workout today.  It allowed me to increase weights and add sets in a number of my exercises. For anyone reading this, I'm still unclear about when to take my supplements.  I do know to load up on the protein after my workout, but exactly when should I be taking additional protein and creatine?  Any help is surely appreciated here, thanks.