Hi mama! Normal lang yan usually, a few of us mums who are breastfeeding around 4 months pp noticed the same thing, yellow and mucus-like discharge na walang amoy. The hormones while breastfeeding can really mess with your discharge, so it tends to be unpredictable and thick sometimes. That said, it could also be a yeast infection or something na kailangan lang i-treat, so better get it checked with your OB just to be safe, they can rule out infection agad and give you peace of mind! If may amoy na, or kung sore ka, definitely go na right away. You're doing great, first-time mom!