yeah paracetamol is another type of pain relief, in australia it's panadol, uk it's calpol - i think for you it is in tylenol that sherry mentioned.
when teething badly (like now we are getting his last 2yo molar and awful nights!) we do panadol before bedtime and nurofin (ibuprofen, i think this is motrin for you???) during the night as it lasts longer than panadol and seems to help him get thru til morning on 2 doses.
as sherry said you can alternate the 2 types of pain relief when they are really in pain, so that would mean only every 6hrs for the ibuprofen. the paracetamol works differently to ibuprofen so is ok to alternate the 2 every 3hrs for a short while when LOs are in pain or also used to reduce fevers.
sounds like he is caught up on OT with just that little tweak to his routine so that's great. if you are worried about the ew returning, just keep on eye on it and if you get 2 or 3 ews in a row then switch back to your old routine.
hope it keeps up for you