Unswaddling

So my little one has been tightly swaddled since birth. She just rolled from back to tummy so we are having to transition her out ASAP. I’ve read mixed reviews on how to do it but the main point is that if you just rip the band aid off it won’t prolong the process. Anyway, we have her in a weighted sleep sack arms fully out and everytime I put her down after rocking her to sleep (yes I rock my baby completely to sleep) she wakes herself up with her arms. Any tips or tricks? Or do they eventually just get over it with time? Tonight could be rough. Any help is appreciated.