31 still no children!!

I'm so frustrated and overwhelmed!! I am 31 years old, me and my husband been trying for 3 years. Before that I have been trying for over 20 years. A few years ago I got a biopsy done and it was found that I had PCOS. I never was told I couldn't have any children, but now I am thinking I can't have any children. I'm so depressed and crying constantly. I just want to finally be blessed with a beautiful healthy baby!! Will I ever have a chance to a mother?