M.P.
My kids around 6 mos could put the pacifier back in their own mouths. We would literally have a "mine field" of pacis around the crib.
This presents a challenge for you as you swaddle. I would start by weaning off the swaddle first. Esp at this age, she is going to begin to start rolling soon, and swaddle might hinder that developmental milestone (they do a lot of practicing in their cribs). One thing that helped with weaning off swaddle was to get a sleep sack. Or try swaddling with one arm out, then progress to two, then none, and then move on to the sleep sack.
Also, both mine still had one night time feeding at this age. I would suggest feeding her around 4:30 and see if she goes back to sleep again. Eventually, this feeding will go away, but at 5 1/2 mos it still seems a little early to expect her to go all night.
Good luck!