E.A.
First, your baby is getting plenty if she is wetting 8 or more diapers a day. The first few days are colostrum anyway.
Second, you say you "tried relaxing" but I think you need to relax better. Feed that baby OFTEN. With my first, I also had engorgement issues, and the best thing I did was get to bed for a few days and nurse nurse nurse. It might be that the baby isn't staying attached long enough to cue the letdown response. Try only nursing on one side for each feeding, she needs that hindmilk for the calories. I see you have another young child. I hope no one is expecting you to take care of him, too, and that the people in your life are letting you heal from the birth and bond with the new baby.
Third, if you are pumping, that may be why you are engorged. You are cuing your body to make more milk, more than your baby requires or is asking for. You are essentially telling your breasts to make milk for 2 or more babies! Take a break from the pumping right now, your baby is only a few days old and doesn't need it. Let your milk regulate itself over the next few weeks.
Fourth, congratulations on your new babe :)