I don't feel connected

I dreamed of this baby. I wanted this baby. We planned and tried for this baby. but for some weird reason I just don't feel connected to the baby. I I'm only 13 weeks and this is my first pregnancy. So maybe this is all normal? idk I guess when I dreamed of becoming pregnant and watched other women in their pregnancies they seemed so connected and so happy and excited. to me it all just doesn't seem real. like I have to remind myself that in a few months I'm really going to have a baby living in my home. I still get paranoid that I'm going to do something that could harm my unborn baby and I'm in contact with my doctor all the time. I'm not regreting getting pregnant. I'm just nervous that this is a sign of postpartum depression. is this normal?