To excited to wait!

Im planning to tell most of my family members on Christmas day but I'm most excited to tell my nan. My mum knows and we both have planned to put the scan in a Christmas cracker so if my nan pulls it she will see but I'm too excited to wait! I'm only half way through week 11 so technically haven't hit the safe zone yet either. I will be about 13 weeks and a few days on Christmas Day and I know it's better to wait for the day but I'm too excited! Any tips on how to calm myself down?! ?