3 Years TTC

So my wonderful fiancé and I have been trying for a baby the last 3 years. We unfortunately lost our only little miracle in January from a miscarriage. Since then we have still been trying. I was told in June that I have PCOS and edemetreosis and that I have a very slim chance of getting pregnant. Has anyone else had this type of problem? It has been extremely hard for us to realize that we may not have our own child someday. We are just ready to give up at this point..Can anyone offer any advice?