Should I tell my extended family?

I am 9wks 3ds, got my first scan at 7 weeks and doctor said everything looks good and chance of miscarriage is 2-3%. Able to get heartbeat on doppler now. Parents and siblings already know. Just found out my cousin is also pregnant at 8 weeks and already told the family. I really want to share our good news too but my husband is very cautious ( which i don't blame him for being) also I'm supposed to be in another cousin's wedding which is a few days after I'm due, so obviously can't be in it, and I want to give her the time to replace me before they stay looking at dresses and such...9 weeks to early to tell??