Grieving my first baby's loss.. pregnant with rainbow baby.

Yesterday was a super hard day for me. I took it so much harder than expected. Especially since my husband said "I just don't let shit like that other me for that long." I'm referring to our miscarriage. Exactly a year ago yesterday, we lost our first baby. I was only about 6-7 weeks along, but regardless, it was so hard for me because we were so excited and a child is a child no matter what.. my son was 6-7 weeks once, and I love him so so much (currently 22+1 with him), but It's not like our first baby didn't exist. My husband was sad when it happened, but I think he just got over so easy because I was pregnant for such a short time and we only knew for like a week before I had confirmation that we had indeed lost the baby. I look back at my life and wonder how my husband could think this way.. am I wrong for that? Because in my eyes, if I'd never gotten pregnant and lost that baby, in the first place, I wouldn't have my little Titus now. I'd have a 4 month old nearly. He's so in love with our son, I know he is, but it just hurts me the way he said that about our lost baby. I bawled for like 30 minutes in the shower. Should I feel bad bc I have my son now? I just feel like my baby is my baby no matter what. If I lost my son now, he would still be my son.. opinions, advice? 😔