history: I found out two weeks ago that I am going to be a father.  It came as quite the shock, because we have been unable to conceive for the last 3 years.  I'm stoked. My wife and I have tried to have a baby for over three years_comma_ and had given up hope.  Two weeks ago_comma_ we found out she was pregnant.
current: I am so happy for you! Congrats!
next: Thank you!  We were both pretty shocked by the news, lol.