[Arganon]

I have brand new 07 Si purchased about 5 months ago, and I seem to already be having problems with it. On occasions when I start my car, it will not start even when I have the clutch all the way down. After a few tries it starts but I have to re-enter the code into the dash and reset the clock. This has happened to me 4 times now. I believe it has something to do with the battery but I am not sure...what do you guys think?

PS: I have not let the headlights on when I left the car before..