I don't recall swaddling for that long, as my kids came out of their swaddling. They were not thumb or finger suckers, thankfully, and I never used a pacifier. (They nursed, so they did have that sucking outlet.) My niece and my nephew, not related to one another (different sides of the family), both had to have major orthodontic work at an early age because my niece sucked her thumb and my nephew sucked his fingers. They had to go through behavior modification as well, per the dentist's insistence, re the stuffed animals/blankets they slept with at night, as it was all so Pavlovian...have stuffed animals, put fingers in mouth, etc. A friend's daughter had to do this as well with her child. If your child does this naturally, oh well. I don't know that you would want to encourage this, though. It could be a real mess down the road.