worried about Sam

Tonight Sam is having a very bad night. He's worrying. A Lot. He's worrying about me dying. He's worrying about what would happen if someone came in our house and took me Billy and shelbie. He's worrying about what would happen tohim if me and Billy died. He's soo full of worries. I don't know what to do to help him. I'm lost here! I keep trying so hard to reassure him that i'm healthy and i'm Fine and that his Daddy and shelbie are fine. How do I get through to him. He and shelbie were up at my parents yesterday playing with my niece and nephew and Sam got scared and started crying because he couldnt' find shelbie. She had gone into the house. He was so scared that she was lost. I don't know Where this comes from. Neither he nor shelbie have ever been lost. I don't know what to do to help him and i'm so scared. I need to call melissa his therapist and talk to her about this. I Pray God Please help him. Please God take his worrys and put them on me. Please