Sister is bridezilla

So me and my bf decided we want to start a family and this is our first month TTC. Anyways my sister didn’t know this but brought it to my attention when I posted about babies on Facebook that it’s HER year because she is getting married this summer AND that no pregnant people are allowed to attend the wedding..well I decided to tell her we were trying and she told me to stop and laughed at me and told me I’m not getting pregnant..welp I got a bfn on my test so I let her know and she just started discussing her wedding...is it wrong that I’m very upset? Shouldn’t she be happy for me that I’m trying to expand our family and her children will have a cousin and she will be an aunt?