Personally I think you should have had least received a text, but I can certainly understand why you haven't. I think yuo did the right thing telling them in a way that was a low key as possible. I can only imagine how hard and disappointing it is to have an unsuccessful round of IVF, but after months of TTC and basically giving up on falling naturally due to PCOS and not ovulating, friends announced at a BBQ gathering with loads of people that they were expecting. I plastered on the happy face and congratulated them because I was so happy for them (and I was too embarrassed to let it show how crushed I was), even though it killed me inside that they fell straight away (after they were told to expect problems and likely have to resort to IVF) and I couldn't. Despite how unhappy I was about my situation, I wasn't going to begrudge them for getting something they also desperately wanted. I was glad for my friends that they didn't have the constant disappointment that it 'wasn't happening' like I did.

Try reaching out to her. It could be one of those cases where she couldn't deal with it at first, and now it feels like she's left it too long?