Mucus in baby diaper 9 weeks old (picture attached)

Iana

Hi all, maybe I can find some answers here. My baby boy is 9 weeks old. Has been having some mucus in his diaper and in the last three days a lot more than usual. He is breastfed but has been eating less in the last three days, I tried pumping as well and trying to give him milk from the bottle. He won't have it. Not gaining weight.

I've been told that maybe he has reflux and that's why he refuses to eat much and has been crying more than usual. He loves to sit on the shoulder, I can't even hold him in my arms as he starts crying.

Started giving him probiotics yesterday in hopes it would help his tummy.

Any ideas what else I can do to make him eat more and make him feel better?