This can’t be normal

So I’m pregnant with my second baby. My 8 week appointment is less than a week away. But I don’t feel... excited like I did with my first. I wasn’t planning this baby, and although I know I will love this baby, I just am having a hard time. I don’t feel happy or even feel like I’m truly pregnant almost like I can’t accept it. Is it normal to feel this? And is it horrible to say I can’t imagine loving another human the way I love my son? I expressed this to my husband and he said my heart will grow and that I’ll love this baby just as much. Which of course I know I will eventually, but is this normal and will I feel like this my whole pregnancy?? This baby doesnt deserve for me to feel this way.. I just feel awful.