I have just found out that my wife is pregnant with our third baby. But we are not financially ready (both earn) to have another child. I am extremely anxious. What should I do?

Yeah, this is a little complex situation, as keeping a child or not is a big decision if not made wisely can haunt you throughout your life. I guess, you sit and talk to your wife and tell her about how you feel about it. Do not take any decision as whatever happens is going to be irrevocable. I think, two of you will unanaimously have to take a decision as how to go about the pregnancy. You talk to her first and see what is in her mind. Does she think that both of you can afford another child! You got to think it hard, as can you see the financial restraint just now, or see it changing for good in the times to come.