TTC after loss and DH

DH and I lost our twins last week at 8 weeks pregnant. I had a D&C on Wednesday because it was a missed miscarriage. I want to ttc again, and I want to not wait a long time. DH is skeptical because he doesn't want to go through another loss. We have a 2yo son now and DH is ok with him being an only child... But I want another baby. Idk when the right time to talk to him about things is? Or how to express that yes I am heartbroken, but I still want another baby.