Announcing

My husband and I have been TTC baby #1 for close to 10 months and finally got a positive! I am 4 weeks and 5 days. We agreed we don’t want to announce until it’s safe, and don’t want our families knowing until at least after the first GYN appointment which is scheduled for 6/5. I really want to tell my mom, though. I have talked to her about this in the past and she said she’d love to know right away and even if something happened, she’d wanna know anyway. I would feel bad telling my mom and not my mother-in-law, but if we tell my MIL, the whole family will know as she can’t keep a secret, and we’re just not ready for that yet. My husband doesn’t want to tell my mom until we can tell his. Which I understand, but my mom lives with us, which makes it even harder to not tell her. I just feel like both my husband and I are so nervous of a miscarriage so I want someone else I can confide in that I trust. Advice?!?!