Was Stuck at Loading Screen, tried support guide, new problem now

Hello everyone. I'm in a bit of trouble with my macbook. Recently it has been running slow and just yesterday when starting the macbook up, it was stuck at the loading screen. I have tried doing a reinstall, but got a failed to install after it ended. I followed the guide that the apple support provided (http://support.apple.com/kb/TS2570), but now I have ran into a new problem. Now when I resorted to erasing everything for sure, my macbook cannot detect a drive to install in. When I went into Disk Utility, it was unable to show the drive that had all my data in it. In addition, I was unable to create a partition or erase any data via disk utility. I am really confused on what to do now and really need help. My last option for sure would be to take the macbook to an apple genius representative at an apple store to see what they can do, but if I could resolve this issue and do a clean reinstall that would be great. Thank you for your time. Hope I can get this fixed.