Loops, sorry to hear you had such a rough time of it with the medicine.
Unfortunately, according to Pfizer's prescribing information sheet, it lists anxiety, depression, emotional disorder, irritibility and restlessness in the 'frequent' side effects category along with agression, agitation, disorientation, dissociation, decreased libido, mood swings and abnormal thinking as less frequent so I don't think you are that unusual in what you experienced.
Those that take this drug and do experience negative side effects should report them to the governments Adverse Event Reporting Agency.
For the US, that link is here. For Canada, users can report adverse events from the drug here.
Why report it? Because this information is valuable to those agencies who regulate these drugs in determining the effects that the drug has 'in the real world' as opposed to clinical studies.