Feel bad for being jealous

Sarah • Mom to Wyatt 💙 and Noelle 💗
So my coworker knows I've been TTC for several months. She has two kids, having just had her second a little over a year ago. She came into my classroom a few days ago and did a "GUESS WHAT, IM PREGNANT!" Announcement to me and my friends that were all there. Now we aren't super bffs, but we are friends. She had just taken a test that morning, and was running around telling the entire faculty at the school. 
Not that I want to judge her for her timing choices, but it just kinda sucks because she knows I'm struggling to conceive, and my close friends that were there with me know as well. I want so badly to share her joy, but I'm finding it really difficult. Anyone else been in a similar situation?