General synonyms:
* Agitated
* Disturbed
* Confused
* Nervous
* Unsettled
* Discomposed
* Rattled
* Frazzled
* Upset
More specific synonyms:
* Flustered: implies a state of being in a rush, disorganized, and possibly embarrassed.
* Frazzled: implies a state of being exhausted and overwhelmed, often from stress.
* Rattled: suggests someone is shaken or unsettled by something unexpected.
* Discombobulated: implies a state of being confused and disoriented.
* Bewildered: suggests a state of being puzzled or confused.
The best synonym will depend on the specific context of your sentence.