but I am concerned that I should have it inspected and not be running
it....have my test runs already done damage? Is it ok that the fin is
not completely straight?

I'd say you got off lucky ... I lost about an inch off my old
Mercruiser skeg. And if the skeg is not causing any steering problems
as is, then my opinion just carry on boating ... maybe have it
straightened when convenient ... if it bugs you enough. Aluminum props
.... good idea with rocks around. If you'd had steel, you might have
done damage to the outdrive ... my opinion ... with aluminum not
likely.

OT: my new Volvo Penta outdrive is manufactured flat across the bottom
.... to save us more adventurous boaters the embarrassment of that
jagged missing inch ??? There are now a few scratches from drifting
across a shoal (drive up, in neutral) to get to bass area. I'm sure the
techs will have some comments when I go for that 20 hour service check
:-)