Bitter siblings

Anyone deal with a bitter/jealous older sibling? I feel like I can't ever celebrate being happy about anything because she always makes it about her. She was with a guy for like 6 years, then she broke up with him and is with someone new. I've been with my fiance over 2 years, and have been engaged over a year. I told her about getting engaged, and she happened to miscarry a day or so before... So instead of gushing excitement, I was her shoulder to lean on. I was okay with that. When I told her I was pregnant, she became distant and weird and acted like she had an issue with me. When I finally confronted her about it, she said she wishes it was her because she was older and felt like I was rubbing it in her face. I took a mental note of that and stopped talking about being pregnant to her. I told her I found out it was a girl, and she asked what I wanted to name her. I told her my fiance and I decided on Charlee Elizabeth, after my dad. Get reply was " you beat me to it". (Screenshot attached) Now this (screenshot attached). Any advice? Maybe I'm being hormonal about this but I'm pretty upset because we used to talk all the time, but now she just pushed me away or acts like an asshole.

I should mention, I never knew she wanted kids. So that conversation about her wanting to name her girl Charlie never happened. She's so freaking hardheaded though, there's no use in arguing. Her previous miscarriage, she didn't even know she was pregnant until she was miscarrying. I've been through miscarriage too, but she wasn't supportive of me then either... I just don't know what to do.