Legal Question in Family Law in Nevada

The classic lawyer answer: "It depends."

You do not indicate how long your parents were divorced while you were a minor, nor why you (actually, your mother) did not receive any child support -- those things probably matter. From a statute of limitations perspective there is no problem -- there is no SOL for support coming due after 1981. But your ability to make a claim for it is an entirely separate matter -- have you spoken to your mom as to why she did not press for collection? For background, see:

http://www.willicklawgroup.com/child_support

http://www.willicklawgroup.com/interest_penalties

As to the rest, "emotional abuse" is a tough cause of action; in legal parlance probably "intentional infliction of emotional distress." And any such tort claim would be separate from the support matter, probably in a separate civil suit, and you should seek advice from a personal injury, not a family law, attorney. There is no cause of action against a person for "not being mentally stable at times."

It does sound like you've had a hard road of it; I wish you the best of luck.