It should smell sweet. open the antifreeze bottle and smell that. Should almost smell the same. Sort of like popcorn with sweet butter. Do you smell it in the interior? If so could be a cracked heating line or heater core (which heats your car and you mentioned that no heat is coming out). Which then you should smell coolant in the interior. Is the overflow tank full or empty?

You could take it to Honda and have them do a pressure test to see if it's that or not.

Really up to you where you take it. I used Honda this past time since I know most of the guys there. If it's a blown headgasket get ready to pay a lot. The head has to be taken off, and most places will mill the head to make sure it seals back up right with the new headgasket.