All iPhone 6, iPad air and iCloud contacts disappeared
All of my iPhone 6, iPad air and iCloud contacts have disappeared overnight. There were settings accessed or changed prior to going to bed, I did not access iCloud prior to this happening, I also went to iCloud.com and all contacts were gone from there also. I do not have any contact backup. I noticed that iCloud status is Green. The only thing that has occurred in the interim is that there were quite a few app upgrades were happening that included Apple Watch related on both iPhone and iPad. I do have iCloud backup but don't know if any contact details are in the iCloud backup. When I go to contacts on iCloud there are only 3 or 4 contacts there. Can anyone suggest a possible resolution to get contacts back?
iPad (3rd gen) Wi-Fi + Cellular, iOS 8.2