This is ENTIRELY separate from the emotional relationship, ok? I am not saying anything about whether he will or won't return to you, or about how long it will take him to realize this needy OW is a bad choice.
But in the meantime, you need to TAKE CARE OF BUSINESS. You are in an especially vulnerable position because you are not married. You need to see a lawyer ASAP and learn how to protect yourself financially. You need to file an order for temporary support and child support. You need to call the bank and tell them you lost your debit card and get a new one. You may need to take half of any mutual money and put it into a new account in your name only.
What is your financial position? Do you work outside the home? What debts do you have, and whose name are they in? Is your name on the house deed? On the mortgage? How much equity do you have? Whose name is on the car title?
