Dealing with friend's pregnancy while still infertile...

Jill
My best friend is sadly still in the midst of her infertility nightmare. I can tell that my pregnancy hit her hard, but she knows how hard and long we've tried and I know she's happy for me just struggling. I'm not going to lie- it's put a strain on our relationship, but she's been my closest friend for the past 10 years, so we're just doing the best we can muddling through it.
Now, another friend who is close enough to know what we've both gone through, but not as close as we are, got pregnant on accident. Of course that's been really hard for my bff and she's basically just removed herself from the situation, which I think is the best move for her at this point. But other friend just messaged me about how hurt she is about it and it's not fair that she has supported her through her whole journey and she doesn't feel like she can talk about her pregnancy freely in our group of friends bc of her. Saying a lot of stuff like "I know you feel the same" and "don't lie. She's not supportive of me" and a lot of over-dramatic stuff like that.
I tried to make her understand that it's not that she doesn't care, but it's really hard for her and she's just doing the best she can and not acknowledging is sometimes the only way to deal. Seems like she has no interest in understanding at all because "we've all been through hard stuff." I feel like I lost so many grinds through this journey bc they got tired of hearing about it and now it seems I'm hearing what people are really thinking while you're going through it. 
Any insight or thoughts would be appreciated.