Wouldn't matter if you were armed or not because:
1) I'm assuming that you have a valid CC permit.
2) The LEO encounter was concerned the driver, not you.
3) It wasn't an encounter where "searching" or closely looking for a firearm was warranted.
4) You would NEVER use your firearm in an unlawful manner.
With that said, it's highly likely that the LEO may have noticed the firearm and not said anything because of the reasons I just stated. Keep in mind that there are a lot of excellent LEO out there that won't bust your chops because you choose to exercise your 2A rights.
Glad you had a good experience.
gf