Congrats on the C Card! No Bahamian waters up in Cool Canada!
OK your instructor had you dive with a DM on the boat? as a buddy? on a dive? you said we so I assume that you mean you did a dive with the DM after you were certified like as in a fun dive,
to have a DM as a dive buddy puts you in the hands of the best dive buddy you can have next to a great instructor that dives=IMO.As Dm's can be instructor's or working there way towards being a course instructor.
So was the dive OK?did you feel safe?
Good luck sounds like you had some major diving while in The Bahamas the turquoise waters ,,,I got to get back soon,
Brad