Advice for pregant little sister with older sister who has been ttc 3+ years

Erin

My older sister has been trying to get pregnant for over 3 years. She has PCOS and doesn’t ovulate, and is currently taking something to help her ovulate. I have been trying to get pregnant for over a year, and two days before my dr. appointment to talk about infertility, I found out I was pregnant. I told my sister and she is overjoyed for me, but I can’t help but feeling disheartened for her. Has anyone else been in my sister’s shoes to give me advice how to talk to her or not make her feel lesser because of my pregnancy? I want her to be as involved as she wants to be and not push her, and when she calls I feel nervous that I’ll say something to make her upset.