You mentioned green poop in the late night thread. If you ebf, that means baby isn't getting the hind milk where there is more protein and fast. Y'all need to completely empty the first breast before switching sides.
Not sure how old lo is because I'm on mobile, but mucous can just be that baby's teething or has a runny nose and is swallowing mucous, but it can audio be more serious than that.
My first little one - a boy born November 27, 2012.
EBF - Natural Birth - Cloth Diaper - Dr. Sears' Vax Schedule - CoSleepers - Water Birth