S.T.
this is so hard. i went back to work when my babies were under 2 months, and not sleeping for long stretches by any means. and it's hard to suggest anything, as babies are so different.
all you can really do is to try different things. so yeah, try un-swaddling her, but i don't think she's going to 'self sooth' at this tiny age, nor should you try to *train* her to do so. maybe try to let her fuss for a few minutes and see if she just complains briefly then goes back to sleep (best but most unlikely scenario. but it did work sometimes with mine!)
she might just fuss herself into full loud wakefulness, though. another thing to try is to go to her when she wakes, but stay very quiet, just rub her back gently, gently and think calm blue thoughts at her and see if she'll subside.
but your best bet is to hand off some of the duties. either pump or supplement with formula (breasts are remarkably adaptable) and have your husband take over at least one of the night feedings. at the very least you can be equally sleep-deprived!
good luck, hon. i know how hard this phase is.
khairete
S.