J.V.
My daughter started a nap strike around 17 months. She is now 20.5 months and still not napping every day. We have recently moved her to a new room, with a twin bed on the floor. She no longer fights naps, as she can just play if she doesn't feel like sleeping. It's working out fine.
Hang in there, but seriously, this could last months. I was reading that sleep strikes are common from 18-21 months, with sleep issues lasting the whole period for some kids. Hopefully your son will settle down soon!
When my daughter's strike began, I started singing/rocking her. I sing Rock-A-Bye-Baby TWICE and then I leave the room. If I was you, I'd put a limit like that on the rocking. I'd also get rid of the pacifier. If he's going to be on a sleep strike anyway, you might as well get a bunch of things accomplished at once.