history: I have many health problems that have prevented me from having children.  I use to be so upset everytime I saw people with children but now I have learned to be content in my situtation I have many health problems that have prevented me from having children
current: Oh my. I am so sorry. That must be so difficult. Are you exploring any other options like adoption? 
next: If I can get my health under control I would definetly look into that.  I use to be very sad everytime I saw people with their children but I have finally learned to be content in my situation