I'm not excited...

I feel awful.... I've always wanted a baby and to find the man of my dreams...couldn't ask for more. but now that we are pregnant (I'm around 5 weeks) I was so so so excited, couldn't believe it, over the moon! but now I'm just not. I don't have a reason for not. I have a few symptoms that should make me "feel" pregnant, but I don't know. I feel terrible, because my SO is so excited and every time he talks about it I just shrug or meh. I want to be excited again :( it's literally depressing me. maybe because this is my first and until I can see our little bear...I don't know. Please no harsh comments I just didn't know if anyone else has experienced not feeling excited during a planned pregnancy?? :(