Tomorrow is announcement day and I'm dreading it...

October Momma • 22 year old happily married mother of boy girl twins, Emma and Alden, born 10/11/17😊
I found about my pregnancy at 3 1/2 weeks. At 6 weeks we discovered a second sac, at 8 weeks wediscovered a second baby, and at 10w3d we found them both to be healthy and developing normally. Against all odd both babies are in good health. When I first found out I told my grandmother she could tell on Easter because I thought I would be ready by then. I'm not. She already bought all of the supplies and is so incredibly excited to announce. I'm not. I'm just not ready but I know if I don't let her tell now that it won't be long before she slips and everyone finds out anyways. This is the longest she has ever kept a secret. (She wasn't supposed to know, my ER doctor told her without my consent.) I'm just so worried that something bad will happen that I can't seem to get excited for this. I'm just worried and once everyone knows, if something bad happens, my failure will be a public topic for quite some time. I just can't handle that. I know if I don't tell them Sunday that I never will tell them at all. How do you get past this and feel excited for the pregnancy? When do you start feeling like it is safe? Easter marks 11 weeks exactly for me.