That is wonderful news! It will change your life and your outlook forever. Your childwill bless your life in ways you cannot yet imagine. You will fall in love with that baby and law school will pale in comparison, unless you can convince yourself that you are going to law school to help your child in the future (more money, etc.). Your wife will fall in love with the baby, too, and may not pay much attention to you, but you will be concentrating on school, anyway. At least she won't miss you too much, since she will be absorbed with the baby. But she will also be exhausted and lonely for adult conversation.
You need to start getting organized. You are your wife will both be very sleep-deprived for a few months. Who will help your wife with the baby when you are at school or studying at home? You will not have much extra time beginning November 1, or maybe even earlier. Set up a support system for your wife. Get the household running smoothly. That means fix anything on your house, or move to another house or whatever before you start shool and before the baby is born.
I have four children, so I know quite a bit about this!