Pregnant Co worker

My Co worker is 22 (I think) and found out she was pregnant. I'm infertile and 20 and it kills me that she's pregnant and bragging. Nonstop. I gave her a week to let her talk about it with me being patient and was genuinely happy (even though I'm heartbroken I'll never experience this) but good lord every day, all day she is bombarding me, other Co workers, and customers with every single tiny detail of all things pregnancy related to her. She's not far along (maybe 6 weeks) so I have a long time to listen to this and she can't stop bragging or talking about it! I admit, I'm jealous. Some day when I am older and more financially stable I plan to adopt, but is it wrong to be jealous and annoyed by her? Will it make her feel crappy to tell her I'm un able to have kids and she should at least limit the baby talk at work around me? I get that she is happy but I'm pretty fed up and sad...