Did you get a paternity test yet? My good bro just found out he's been paying child support on a kid that's not his for 12 yrs. He was blonde, his old lady a red head, and his kid was born with jet black hair. We all told him something was up, but he refused to believe his old lady would ever bone anyone else. The moron thought he was sooooo special no bitch would ever cheat on him. For what he's been paying in child support the last 12 years he could've leased a new Porsche. He's so depressed he's talking about shooting himself in the head. I'd hate to see you end up the same way.
Actually I think you're screwed in the paternity test dept until after the baby is born. A test can be done on the baby now, but it's invasive and may inadvertently terminate the pregnancy.
Looks like you're stuck floating the bill-it's about $10K to deliver a baby as long as there's no complications. Tack on another $5K or so for a c-section. I hope you have insurance.