my Macbook make a strange noise when I turn it on.

I bought it less than two weeks ago, and I'm so in love with it that I want to make sure it's okay all the time.

when I turn my Macbook on, the machine inside makes a strange noise. in all honesty, it sounds like the hard drive is only adjusting, like machinery getting into gear, but I'm not all that sure.

I wanted to ask on here before I ran back to my local Apple Store crying like a baby.

thanks (;