I know you must be in a bad mood facing this right after you gave birth. But being a parent would change you completely. You will not only think of yourself but also think how your child would like his dad and mom to be in the future, either his parents are under same roof or not.
Do not concentrate on revenge. Think of mutual benefit. You will get child support anyway.
I seperated from my child's father before the child was born. Now I am divorcing. I have dummy email address you can chat with me: oneofssn@yahoo.com