Is it remotely possible that your dad was kidding? He just might not have been aware that with the pain that you are in that it just wasn't very funny.
My sister in law also had to do the bedrest thing. It was very hard on her. But worth it. He is now a very healthy and happy fifteen year old who can't wait to get his driver's license. (they grow up so fast).
Good luck and take care of yourself and your baby.
:D