Sometimes when i focus on a task, my mind feels like it is moving at a hyperactive rate. any idea what this is called?

Hyperfocusing: This could be hyper focusing if you have add or adhd. It could be the accelerated thinking of generalized anxiety disorder, or, less likely, the racing thoughts of bipolar disorder. It could also simply represent the excitement of dealing with an interesting task.

Depends: If this is something completely new for you but is affecting your focus at work or school you would not typically consider add. This is a disorder that presents before the age of 7. If this is new but is not having negative impact on work or school may not be a concern and potentially helpful. A much more thorough history is needed to consider diagnosis.