it could be that what you are thinking is "where's my paci" is something else. Perhaps it's "my tummy hurts from gas/reflux" or "I don't like swaddling anymore". At 5.5 weeks she's coming up on a big developmental leap and lots can change. I suggest you try to change up the swaddling - maybe let one arm be exposed. Or see how long you wait after eating before the nap - maybe she needs a bit more time propped up to digest before being laid down.

My daughter has never slept more then five hours max between the hours of 9am and 7pm. As a baby she was so alert that people used to ask me if I fed her sugar!
My pedi said as long as all is normal in the growth and what not that it was fine. I just had an active baby. He said sometimes that was just how it was. I was worried too becuase my sisters kid slept for 20 hours a day!
But not Marlow...she's 8 months old now and her naps are at the most 2 hours long usually, and sometimes there is only one nap.

My little girl is also very alert and has been since day 1 which was odd considering I had pethidine in labour.
Anyway...she is now 7 weeks and is too very hard to settle down for a nap.
We swaddle her as she is so active and wakes herself up with her movements, give her her pacifier and lay her in her crib, although she has to have very heavy eyes before we set her down or she will be bright as a button again, we also put classical music on for her on a low level as it seems to soothe her back to sleep without our intervention if she stirs.

I also have a very wakeful and alert little girl...we should arrange a play date! :) LOL...Sophia does not settle down for naps, either...and in fact, she was awake for 10.5 hours straight yesterday. Thought I was gonna lose my mind. Could it be that she's hungry? We tried the pacifier w/Sophia but she spits it out, and only wants to eat, eat, eat. Also, have you tried a swing? A few friends of mine recommended it. My husband's niece recommended a sling, as well - she swears by it.

I hope you find something that works...if you do, let me know! :) Good luck!

My DD would not go down when she was swaddled. She has to have her hands free and when we brought her home for the hospital it was a very long night becase we did swaddle her. I never did it again and she slept fine and through the night . Sometimes it's a guessing game but if she is not upset maybe she just doesn't want to sleep too.

Thanks ladies...
FYI- I only swaddle her legs, arms out... I think keeping her legs swaddled helps when she startles. It seems we have to catch her an hour hour and a half after being awake. She gets a little fuss noise. If we can catch that, it takes her less time to fall asleep. I am going to keep working at this.... I know that she is tired, she just fights it! Once she is in her crib and settled her "saucer" like eyes are closed and she is drowsy.... she just doesn't want to miss a beat, I guess!