What should I do?

My son is almost 6 weeks old and every diaper change is a poop one so normal I think is like 3 or 4 a day and im getting like 10 to 12 a day. He is formula fed if that has anything to do with it. Poor baby has such a bad diaper rash that the skin around the chafed area is bleeding ive been using Destin thickly every diaper change but it doesnt seem to be helping and now I have no idea what to do. Any advice?