Hi Stef,
I feel so bad for your dad, but I'm glad he's feeling better. I'll pray throughout the day that he does well. He's a strong man with a strong constitution to be able to go to work after being sick like that.
Do you or you mom work to help out in case your dad can't work. He might get to that point soon if the Lord doesn't heal him and takes him home instead where he will have perfect health.