As a parent of a child in Massachusetts, you typically have some rights to child support from the other parent. You do need to be entitled to those payments, though. If you can answer these questions with "yes," then you likely are eligible to receive child support.
First, are you the custodial parent of your child? If you have primary custody of your little one, then you're likely able to receive child support. If you're responsible for day-to-day care or have been designated as the custodial parent by the courts, then this likely means you should be receiving support.