My baby boy is 2 months old. Since his umbilical cord fallen there is discharge coming up. Earlier it forms blackish color crust over the navel.Now it is like a crusty pus over the navel. Inside belly button there is whitish/pinkish substance which looks like have a mild clear fluid everytime we see. It is not coming out of belly directly but it forms thin crust (pus type) over the navel. We are applying tbact cream. Please advise. Attaching images