Great advice so far mama!
What I've figured out is that as long as baby is gaining and gains at the same rate then I wouldn't worry. Some moms produce heavy cream, some produce skim. Your body was meant to feed your baby and aside from any medical condition for either of you it will.
I definitely agree with contacting IBCLC or someone from your local LLL before jumping to formula (which is not evil and has a place).
I lift my eyes unto the hills, Where does my help come from? My help comes from the Lord, The Maker of Heaven and Earth. And I'll praise You in this storm and I will lift my hands, For You are who You are no matter where I am, And every tear I've cried You hold in Your hand, You never left my side and though my heart is torn, I will praise You in this storm