Panicking!

My husband and I have an almost 18 month old and went through a miscarriage at 9w in March. We are currently 18w with rainbow baby and two nights ago my husband told me while we were getting ready for bed that he is afraid he isnt going to like the new baby, that he wont hate it because its our baby but afraid he wond have feelings for it. He says at this point he doesnt feel any attachment to it. I told him the attachment may be because he hasnt heard the heartbeat yet or felt it kick. I feel keep telling him the love for another child just comes but he is still afraid and thinks it may be part of his previous notion that he wasnt meant to have kids. He is completely in love with our daughter