Am I overeating?

My best friend since high school has been ttc for over a year now despite all of her medical conditions. Two months ago she finally got a bfp but now that is all she talks about. We cannot have "normal" conversations anymore without her saying how much she's been sick, or how big she's gotten already, or how her friends at work won't let her do anything anymore because she's pregnant.. Don't get me wrong, I'm really happy for her but I just need to get opinions. Am I overreacting because this is her 3rd child and I can't seem to have one yet..?