Hire an attorney. IMMEDIATELY!!
You might be able to TEMPORARILY put a halt to her plans to move until you have a hearing in front of a judge.
Start thinking about why it is in the child’s best interest to be with you and not your girlfriend BUT DON’T PUT ANYTHING IN WRITING!
Try NOT to do anything to piss off the baby’s mother. You do that, she’ll take the child just to piss in your face (sorry about the language but it adequately conveys my message). At the same time, don’t roll over and play dead – be firm but gentle.
HIRE AN ATTORNEY – WHY ARE YOU STILL READING THIS – YOU SHOULD BE ON THE PHONE.
Okay, the attorney is in court or you don’t have the money. If you haven’t the money but are too rich for pro bono or legal services, take a couple of days off, haul a&$ to one of the law school libraries (call to make sure they are accessbule to the public) and do some reading on motions for temporary custody (a/k/a pendent lite) and restraining orders against removing the child from the jurisdiction of New York State. With sufficient groveling in front of the court clerk who files the papers (often a non-practicing attorney) or in front of the reference librarian you might be able to buy yourself some time to figure this mess out.
This forum has some faq’s someplace (I can’t remember where) that are pretty helpful. READ THEM and calm down. You haven’t lost yet and will not lose until the FINAL decree even if she TEMPORARILY gets to take the child out of state.
NOW SHAG IT BOY – YOU’VE GOT SOME WORK TO DO!!