See if you can copy out your data using the Windows 7 DVD or Repair CD: Copy & Paste - in Windows Recovery Console - Windows 7 Forums
Please be more specific about where you can see your missing partitions - are they under Computer? What happens when you try to open them?
Exactly what did you do to make the Repairs from CD? Is there a second HD as this one is showing only one partition. It shouldn't really revert to a single partition on HD unless you change it yourself. So tell us exactly what steps you took.
If everything should be on the same HD, boot free Partition Wizard
bootable CD, from the Wizards tab select "Partition Recovery" have it do a scan to see if it finds the missing partitions. You may need to shrink C back to it's original offset for the recovered partitions to be restored.
This is an important lesson in always keeping your data backed up externally. If you can't afford an external HD, or it won't fit on DVD's, then you can send it over the network to another computer, or use up to 25gb of free storage on Skydrive with each Windows Live ID - google it.