Where to begin?

I went in today for my follow up ultrasound. I should be almost 9 weeks but still measuring small and no heartbeat. I have to take medication to help my body begin to miscarry. Besides being angry and heartbroken I don't know where to start. I have an 8 year old that I told was having a baby brother or sister. I regret it so much I just got caught up in the excitement. How do I tell her? My email is flooded everyday with emails from Glow and ovia and baby center and what to expect and I don't know how to make it stop. I have pregnancy books and tests and I don't know what to do with it all. I feel numb. I feel like this is going to continue happening to me, I just can't make sense of it.