Why does it feel like we’re growing apart

I’m 16 weeks pregnant and I just feel like my boyfriend and I are growing apart. I don’t feel as connected to him anymore and I don’t understand why. This should be the happiest time of our lives we’ve been trying for over a year and our little miracle finally happened. It’s not that he doesn’t treat me right or anything like that. It’s just the connection just doesn’t feel the same anymore. I love him so much and he’s been so supportive but something just doesn’t feel right anymore. We used to be in a long distance relationship and I felt more connected to him then, than I do right now living with him. Is anyone else experiencing or gone through this?