When do you let yourself get excited?

I’m pregnant with my first baby, but I’m only at five weeks and two days. I’ve had a few chemical pregnancies in the past, so this is the furthest any pregnancy of mine has ever gone. All my hormones are progressing great (I’ve had three blood tests done to make sure), but I feel like I’m not letting myself get happy or attached because it’s just so early and I have no idea what could happen. Has anyone else ever felt this way? Does the excitement just naturally come as a pregnancy progresses?