Going to be an aunt... Wish I was going to be a mom..

My husband and I have been trying for a while now and I've about given up hope. Today we found out his brother, who is still in high school, is going to be a father. I have no hard feelings towards him. I can't wait to be an aunt. But it just feels like a slap in the face that people who arent trying and arent ready get pregnant left and right. For years I refused to try until I had a good job and nice house and good benefits and now that I want to be a mom it just wont happen. I feel a little defeated today. Not unhappy for anybody else, just hurts.