How can my sons father go about appealing or modifying a new court order for support that was just granted if he agreed to it?

If he agreed to it it can not be appealed.

Yes, if she lives in New York you can get a divorce here. If it's uncontested no appearance in court is necessary.

Yes, what you say on the record is binding - but no, what you said does not appear to be. That you had agreed, presumably in a conversation with...

What can I do? Defamation of character, wrongful accusations, emotional distress.

In most states prosecutors have complete immunity from this type of action. However, the specific facts of your situation and the laws of your...

Bigamy?

His new marriage is void. Yours is still legally valid. However, a divorce may be exactly what you need.

Can I get any visitation rights for my ex girlfriend's child?

If the child knows you as a parent, it may be possible. These cases are not easy - but they can be won.

Can I get married to someone from another state who is still married but her spouse and her do not have any relations for years.

No! If she's still married she can not marry again without a divorce first!!!

My husband tried to kill me in a van collision 2/17/16.. I want to press charges.

The statute of limitations is five years, but... "tried to kill me in a van collision" is something that will need to be further developed.

Do I have to pay back a gift that I was given if he harassed me to? He’s threatening to take me to court.

One does not have to pay for or return a gift. If it was a gift, it's yours.

I received a call from a lawyer in Denmark regarding a divorce but the lawyer involved works for my ex went to court for both?

The divorce would be contestable in New York under those circumstances, and any distribution of property or determination as to spousal support...