Fever, Mucus In Stool My 4 1/2 Month Old Has Mucus In His Stool. Any Advise?

My 4 1/2 month old has mucus in his stool. Any advise? - fever, mucus in stool

My baby's congested for about 2 1 / 2 weeks. On Monday we have him in the Dominican Republic and said that probably a sinus infection and put him on amoxicillin. It has become better and this weekend it has become increasingly congested, coughing more and more irritated. In addition, yesterday and today had mucus in the shit and had very frequent bowel movements. For example, today we have 5 BM and had only 245pm. This is the shape of your body to the mucus, or even worse? I'm afraid it dries May (still) eating the same amount. I also note that there is no fever.