Installed Windows, no OSX won't boot

I had problems earlier today installing Windows. It ended formatting my entire hard drive. I reinstalled OSX and then I reistalled Boot Camp and Windows. The Windows went along with a few snags, but it seems to work. Went to go back into OSX and it says I need to restart. I think it is a kernal attack, but I am not sure. I will click on the OSX volume, it will wait a second, then a grey "curtain" will drop down the screen and it tells me to restart. Is there anything I can do other than reistall OSX again? I did boot from the disk and attempt to repair permissions and verify the disk, but it passed both. Installing OSX takes so long.