6 weeks, doesn't feel real and can't be excited

I'm 6 weeks and it doesn't feel real that I'm pregnant and I can't be excited. This is something I've wanted for such a long time and I always thought I'd be way too excited whenever I got pregnant but no. I'm definitely happy about it, I just feel like I can't let my excitement out until I'm past the 1st trimester. I'm really hoping it will kick in and I'll get excited when I finally have my 12 week scan. Is feeling like this normal? Does anyone else feel like this?