Infertile Friend ignoring me...

Andrea
I have a good work friend who has been dealing with infertility and all the big problems that come along with it. I have been very supportive to her through all of this. And have been truly hoping for her dreams of being pregnant to come true.
I had told her a few months back that my husband and I were trying to conceive. She seemed ok about it, but I wanted her to know.
We obviously became pregnant, and just this last week, we told friends and family. I wanted to tell my friend before announcing it at work, so I texted her thinking this may soften the blow a tad. She texted back "congrats" and that is pretty much the most she has talked to me since. 
If a group of us are talking, she acts like I am invisible. I haven tried approaching her to talk about different subjects and she begrudgingly talks enough to get me to leave. I'm having a hard time not getting angry or sad about how she is treating me. I understand this would be hard to deal with, but I did everything I could think of to soften the blow and she is treating me like I got pregnant to hurt her. 
Anyone have any advice on how to resolve this or how to get through it without feeling so rotten about it?

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