N.M.
I'm not sure if I have any good advice, but just an observation, it might be hard for him to adjust to 2 major transitions at the same time, big boy bed and no pacifier. However, now that you have started it might not be a great idea to stop in the middle either. Praise him for what a good job he has done so far. Even work out some rewards for staying in his big boy bed at night and during naps. I used to write out the time it had to be on the clock for my girls to get out of bed, and put it right next to their digital clock with an explanation, that worked for having them stay in their bed in the am. I would work hard on ways to ease him comfort in taking a nap in his big boy bed so he begins to get the sleep he needs. At this point he may be so exhausted that you might just get him to nap again. As with any transition, I would say it will take 3-4 weeks before he is adjusted. Even if he refuses to sleep I would let him know that he must at least lay down in his bed at nap time and rest. Offer books for him to look at and music to listen to during these "rest" periods, it may just put him to sleep. He may also begin to attach to other things like toys and stuffed animals. My son sometimes sleeps with his trains, cars and now Walle toys. Good luck!