In most cases child support orders are enforced until the child reaches the age of majority, which in most states is 18. There are however, contributing factors in individual cases. The age may be specified in the original order, or it can be modified if the child is a student, or disabled, among other things. Consult the state of residency's emancipation laws. If that child dropped out of school that also matters check your state laws
If you live in the US... Being pregnant/giving birth does not emancipate a minor.
No, your child will not be emancipated because she is pregnant and her parents still have to support her until she is.
He would no longer be obligated to pay support.
That is dependent on state laws and whether he stopped paying due to be denied access to the children, which happens in 60% of the cases.
No. Fathering more children will normally mean paying more support, not less.
You should contact your attorney. It is likely that you should be paying the support to DSS.
Children whose parents do not support them end up receiving public assistance.
Depends on the State. However if he is not a full-time high school student and is age 18 child support is no longer an obligation.
You're in arrears because you didn't pay the money when you should have. You owe them a debt, and you must pay it.