How did you handle rainbow?

So I found out I was pregnant again at 3w3d. I had a miscarriage in May at 11 weeks and had a D&C. I’m currently 4 weeks, my sister, best friend and dad know. (My dad guessed, the other two I told) I’m avoiding telling family until my ultrasound confirms a growing baby but it’s so nerve wracking. I’m waiting to tell my mom mainly for her sake, she had a mc when she was younger and my MC triggered a lot of unresolved feelings for her.

It’s really hard for me not to share with her because of the feelings I’m experiencing and the nervousness. I feel completely alone. I was looking on Pinterest at lunch for ways to tell her in a few weeks and my sister said “stop doing that. You’re just going to get your hopes up and be upset if you MC again” and honestly it made me really upset. I was so nervous at first and I’ve been telling myself this is gonna be the one. Healthy and gonna have good news and she just really knocked me out of that mindset. I just need advice. Did you wait to tell people, and if so until when? What do you do to keep busy and not think about the what if’s?