I was seperated almost 6 months and still "legally" responsible. Different states have different rules on this.
Sorry about this marriedcrazy. Know that you aren't the first and certainly won't be the last to have this happen to them. I've been thru it. My Ex lost that baby at 6 months but all medical bills were my responsibility even though she and everyone knew it wasn't mine. She readily admitted it wasn't. Didn't matter "legally". Contact lawyer now - please.