Feeling blue...

I live with my cousin and his wife. They're trying to get pregnant. She knew I was trying before we got pregnant. Her and I have both had difficulties getting pregnant, so we both encouraged eachother and talked about our opks and everything. When I got pregnant, she changed completely!! She barely talks to me, she gets mad whenever someone talks to me about my pregnancy, she got upset because I showed her husband(my cousin) ny ultrasounds yesterday.... I don't get it. Why isn't she happy for me? She's being so rude to me and I'm getting to tired of it!!! When she gets pregnant, I shouldn't be happy for her, right? I mean, she's been treating me so shitty and making me feel bad because I got pregnant and she still hasn't!!! 😔💔

What do I do...