Might be TMI but willing to ask💩🙄

K.
My baby girl is 16 weeks old. For the most part I solely breastfeed. I work 2 nights a week and for those feedings supplement with some Baby's Only organic formula. I've been trying to build my milk stash up but is a slow process so in the meantime use some formula. My baby's poop the last few days has  been a little mucus-y. I know this might be a weird question but has anyone else's baby have had this? This past weekend (when I've been with her and no formula was used) her poops were like this. Just wondering if it is something to be of a concern. It still looks like breastfed baby poop, the texture is just different. Sorry for the details😶😐😬