Niece pregnant

My eldest niece (I have 9 nieces and nephews altogether) has found out she's pregnant. She's 20. She was told that due to some complications that she couldn't have children. I am very happy for her. But a small, teeny, selfish part of me is mega jealous because I've been trying to get pregnant for 2 years (I'm 34). Makes me feel old too being a great auntie! Wow.