LO fussy after feedings

gosborne

DS is really fussy after feedings during the day.  He nurses for a good hour sometimes and is still fussy (after burping).  I have tried not to give him a bottle and just let him keep nursing, but he seems to get really mad and will not stay latched on.  Is that a sign that I'm not producing enough milk for him?  I go back and forth between nursing and pumping b/c of my schedule, and when I pump I get between 2 and 4 oz.