Nobody tried to get a dictionary to help with the disoriented/disorientated problem yet? Well here ya' go:
Adj. 1. disoriented - having lost your bearings; confused as to time or place or personal identity; "I frequently find myself disoriented when I come up out of the subway"; "the anesthetic left her completely disoriented"
lost, confused
unoriented - not having position or goal definitely set or ascertained; "engaged in unoriented study"; "unoriented until she looked at the map"
2. disoriented - socially disoriented; "anomic loners musing over their fate"; "we live in an age of rootless alienated people"
alienated, anomic
unoriented - not having position or goal definitely set or ascertained; "engaged in unoriented study"; "unoriented until she looked at the map"
both from thefreedictionary.com. Seems that either can be used.disorientated; disoriented
adjective confused, lost, unsettled, bewildered, mixed up, perplexed, all at sea I feel dizzy and disoriented.