Think I made a huge mistake with Bootcamp

Running a Macbook Pro that I recently obtained for free through a friend. Not a Mac person so I wanted to install Windows through Bootcamp. I partitioned the drive and tried to proceed but I got some error message saying that Windows could not install to the drive partition (something about can only install to NTFS format, I think). While obviously a bad decision in retrospect, I noted that it gave me the option to reformat the partition and proceed, so I chose that. Obviously, this wiped the Bootcamp software from the partition. I was able to install Windows 7, but now the computer does not work very well because it didn't install the Apple driver package, and I'm also unable to boot into OSX-- I don't have the Bootcamp utilities in Windows and when I restart the computer it goes straight into Windows 7 without giving me an option to load OSX. I'm fairly confident that I only reformatted the partitioned part of the drive so the Mac software should still be there-- anyone have an idea how to get it to load into OSX so I can delete this Windows installation and start over?