DS has a cold and a double ear infection!!

I've noticed that he's been nursing less often and less in frequency. To the point I felt too full to nurse and had to pump yesterday afternoon. (although he is waking to eat atleast one extra time at night). I didn't know when it becomes an issue... He seems to still have the 6 wet diapers per day (minimumally). He's suffering a bout with the antibiotics and some diarrhea.
We started him on a probiotic to help with the upset tummy and diarrhea but he still seems to be eating less.
Re: BF frequency with a cold
It's extra frustrating cause I'm getting a plugged duct after yesterday's poor nursing.