The blows just keep coming -- any advice?

I had a missed miscarriage at 10w 4d in March, a chemical pregnancy in April, and now just finishing up my second chemical pregnancy. Well, my twin sister who has a healthy 2 year old and knows about my struggles this year, just told me she is pregnant and "wasn't even trying". Seriously?! I'm so heartbroken. Why not me?! I don't even know how to move forward. Could she have at least waited until I had completed my most recent loss? I just want my rainbow baby so badly. What did I do to deserve this? I'll be 37 in less than 3 weeks which makes it even worse. I don't know how much more my poor heart can handle.  😥