Synching Help, Completely Messed up Contacts

[alienxing8]

I'm not really sure what happened at all, but at some point today either my Gmail, or my Blackberry completely messed up and All my contact information got royally Screwed Up.

Numbers were either deleted or became a different contacts name (On Both my Phone and my Gmail Account)

Various entries became repeated

PINS became associated with different contacts

Other contacts were erased and then replaced with different contacts who were already entered into my phone.

Has anyone else had this problem, or know what caused it?

Does anyone know how to fix this?

Any help would be greatly appreciated, thanks.