Two family members pregnant?

Alysha • Husband 01/25/2016💍 Declan 04/14/2016👦🏼Alyxia 09/06/2017👶🏼 my lovely family👨‍👩‍👧‍👦
So I found out I was pregnant two weeks ago and me and the SO was happy. But we were going to tell my sister like the next day but she texts me that night with a bfp of her own so I just told her than. But anyways she has been spotting and I haven't and yesterday I get a text saying I am now the only one in the family pregnant. Is it bad I feel sad that I am the pregnant one and she isn't even though we were figuring it was going to happen? Like what's going to happen when I start growing bigger and she can't because she lost the baby? Just thoughts that has been going on in my head for the past little bit.