Feeling like a single parent...

I've been feeling like a single parent for a while now. My husband and I have been together for six years now and don't get me wrong, we have a GREAT relationship! last year we decided we were ready to become parents, and our daughter was born July of this year, she'll be six months old this month. Since our daughter was born I have felt like I'm doing all the work, because, well I am! My husband had back surgery February of last year and still suffers with significant back problems. He says it causes him discomfort to change the baby's diaper, he's pretty tall so he has to bend over a bit while changing her which tweaks his back. He complains of the same issues when giving her a bath. I am also exclusively breast feeding so he can't help with feedings either. Therefore I am responsible for all feedings, all diaper changes, and every bath. I know my husband is being honest about his back issues, but I just feel so jaded that I have to take sole responsibility for all of our daughters needs, I feel like a single parent...am I wrong to feel resentment towards my husband? Some times he will mention having another baby in a few years and I think to myself "of course, easy for you to say, I'm the one that has to make all the sacrifices, I'm the one that has to carry that baby in my body, go through excruciating pain while giving birth, feed it from my breast, change all of it's diapers, give it all of its baths!" I truly love my husband, he's a good hard working man and he loves me and our baby girl with all his heart and soul, but I'm finding myself full of resentment lately because of the lack of responsibility he has when it comes to the baby. I can't bring it up to him because I know it'll just make him feel guilty for something he has no control over. How do I get past these hateful feelings? 😓😟