I think because you have done ivf it would be good for you to give her a call talk about how she is feeling and I am sure she will want to talk about your wonderful news.
You are so right to have not told her in person. As someone who has just done a ivf cycle that hasn't worked and has had 3 yep 3!! People blurt their pregnancy news to my face in the past few days I much prefer the one person who texted me her news!
TBH the head space I am in is not any that I experienced before so while I agree she should have congratulated you I can understand why she is avoiding you it's not personal it's just that horrible selfish feeling in the form of 'why not me' that comes with infertility as I am sure you know.
Call her