Feeling slightly guilty

So yesterday this finally happened...bfp!

Hubby & I have been ttc our 2nd for a bit over a year now and last November I had chemical pregnancy (or early miscarriage) & we hadn’t had any luck since. Just when I was starting to be ok with it not happening right now, because of things that are happening in 2020, like my sister’s wedding! Which I am a bridesmaid in! Which I already bought the dress for! lol so while I am so happy it finally is happening. According to the app I am due 3 days before her wedding!!!

I’m afraid this will interfere with the way she has pictures her wedding or that I am stealing her thunder. She is not that type of person, but I can’t help feeling this way & guilty for it.

Any advice?! Thinking of telling my fam on Xmas...should I tell her sooner? According to Glow I am only 4 weeks, 2 days.