breastfeeding related to soothing for sleep?

CLASSICAPPLE

hi all! 

my LO is 1 1/2 months old, and we are EBF. she keeps a pretty consistent schedule with her naps and sleep time at night, and we've been doing well for the most part. however, some of the things i'm struggling as a FTM (and am hoping for your support/advice), is of coarse, SLEEP! During her naps, i will usually put her in her swing, and she would nap for about 45 minutes to an hour and then will wake up and start to cry. i pick her up, and then she needs to be soothed to sleep. depending on the day, she will either want to be soothed by sucking my breast, or just patted on the back. she'll easily fall back asleep after about a few minutes, then i will put her back in her swing and she will sleep her other 45min-1hr that is left of her nap. she will do this during every nap time! i also notice that she does not want to be soothed by my husband, she will only start screaming more and get really awake and impossible to soothe to sleep again. also, i tried a pacifier, and she doesnt like it. she's also a bit colic, but it only seems to affect her at night when its time for bed and even that has gotten considerably better since we started her on gripe water one week ago. (nighttime sleeping is another story) right now i'd like to here what you all are experiencing, what you have tried, whats worked, ANYTHING! i'm getting worried because i would like to get to sleep better given that eventually she will need to be going to daycare at 3 months old, and before then i will be dropping her off at least once a week so she can get used to it a bit. she is using my boob to soothe, and although its not a huge problem right now, i dont want either of us to suffer if she cries miserably when its time for her to go to daycare. how can i get her to sleep better through her naps??? PLEASE HELP