Announcement Guilt

Me and my fiancé plan on announcing our pregnancy on Christmas to our families. I am just concerned and feel guilt because my sister in law suffered an ectopic pregnancy 2 years ago and had been dying to try for a baby since then, however her husband is refusing. I had a chemical pregnancy in June and I know the feeling of feeling like everyone around you is getting blessed with pregnancy. My fiancé’s sister announced her third pregnancy in September and I know she was upset. I just feel guilty and don’t want to feel like I’m ruining their Christmas. Has anybody else felt guilty announcing a pregnancy?