Finally pregnant but I'm not happy

My husband and I have been trying for almost 2 years... the month we decided to completely stop trying we ended up getting pregnant. I'm currently 12 weeks.

I know I should be happy, I've wanted this so damn bad but now that its finally here I'm not happy i have no attachment or genuine excitement towards this baby...

I do love them and I'm excited to be a mom but when I actually think about them I just feel blah... its killing me...

Has anyone felt like this or at some point did you gain that attachment? I'm just ferl so lost...