How to deal with my baby excitement and sisters fertility pain.

My two sisters have both dealt with fertility issues their whole lives. (Backstory- older sister has two kids via IVF and now she is happy being done having kids, younger sister is just starting fertility medication but has been trying naturally for over 5 years) So I gave my younger sister a little heads up a few days before announcing my pregnancy at Thanksgiving. I know it’s hard for her. But she cheered and celebrated with everyone and then My BROTHERS wife announced on Thanksgiving that they were pregnant as well and due only four days after me! Unfortunately they had a miscarriage about a week later. I am hard broken for her, but she seems to be handling everything fine and they will start trying again in a month or two. My family is very loving and close so I can’t help feel extremely guilty that everything is going really smoothly in our journey to grow a family. Maybe I am just really hormonal. So the most recent news is we just found out we are having a girl! There are only boy kids so far (two boys from me, two boys from my older sister) and me and my husband are so excited. We haven’t told my family this news yet. I guess what I am looking for is advice on how to handle my excitement, and gender reveal (should I not make a big deal out of it?) I feel like all the good things are happening to me. I get pregnant easily, and now I get the first girl of the family. I cant help but feel really guilty. I really don’t want to be insensitive to my sister and sister-in-law by making a big deal out of it, but we are really excited. How to proceed? Should I keep pregnancy related things on the down-low for a while? Am I overthinking things and should just be excited for my healthy baby girl? PLEASE no hurtful comments. Please understand I really care about my sisters feelings.