What number is considered a low sed rate. mine is 6?

No such thing: It is a measure of red cell settling in a tube. Elevated is significant, low is not.

Sed rate: Normal -newborn: 0-2 mm/hour -children: 3-13 mm/hour -women •range for ages 18 to 50 years: 1-20 mm/hour •range for age over 50 years: 1-30 mm/hour •normal maximum: (age in years + 10) / 2 -men •range for ages 18 to 50 years: 1-15 mm/hour •range for age over 50 years: 1-20 mm/hour •normal maximum: (age in years) / 2.