Oh boy. I had no idea this had happened. Don't you for a second feel guilty, these things happen. I lost my dad when I was 8. He drowned. We were all there when it happened. The only helpful advice that I can give you is this: Don't hide your grief from your daughter. It's okay to cry in front of her. It's okay to talk to her about how much you miss him. My mom shut off her emotions from us. We never grieved properly. The few times my mom did talk to us about missing my dad made me feel better. Life will get back to normal. It will be hard but I am glad for you that a little piece of him lives on in your daughter.
I would really like to send you something. If you'd pm me your address, I'd be grateful. But it's up to you.