My DS hated his first OT, was in pre-k so about 4.5 years old. The OT had no experience with someone as bright as he was. She typically worked with individuals challenged on multiple fronts. So her typical approaches really put DS off. He did about 8 sessions but it became pretty apparent it was a bad fit. He now has an OT in his gifted school and it is much much better. So I would just advise to evaluate the relationship as the better the connection formed the better the OT will be able to help your child with what needs work.
DeHe