My wife and I had to abort out 3mo unborn child due to complications. Now my wife is very upset with me and I don't know what to do. How do I console her?

Your wife is going through depression. Losing a child is a big blow for any woman. Its a big blow for you as well. You both need to talk it out. Ask your wife why is she upset with you? You were not responsible for the abortion. You both need to seek the help of a counselor to get out of this depression and loss.