When to tell my mom I'm pregnant

Mia • Mommy to Xi 9.18.19🌷 ARMY wife est.2020

My mom had me when she was 17 but got pregnant at 16. She was always on her own and she always drilled it in us to not get pregnant even recently she told me to stop posting so much about babies and get a puppy instead of having a baby, I'm 99 percent sure I was pregnant then. I found out yesterday that I'm 5 weeks and 1 day pregnant! I'm 19 and my fiance is 20. We just want the support from family, I live 8hrs away from everyone and I dont know how to tell her. Any suggestions!??

UPDATE: My moms birthday is tomorrow shes turning 37 and we sent this out to my mother in law and of course to my mom as a birthday present... Should be there in 2 days