15 weeks .. feeling to normal.

♚NAS♚ • Born in South Africa.. happily married.. 2 baby boys under two years.
So I'm 15 weeks today and my just feels too normal .. I know that in the second trimester things start to ease up .. but I just don't feel pregnant .. and sometimes it scares me and sometimes I'm like im sure everything is fine .. this is baby #1 .. so im not sure. am I overreacting?????