18 weeks pregnant

I'm 18 weeks pregnant.

I'm 30 yrs old and this is my first pregnancy.

from the beginning, i never really felt "pregnant" no real morning sickness, cravings, etc. in the past doc visits, we were able to see the baby move, listen to heart beat and all

Now that Ive reached this week I'm starting to worry a little. I wonder if everything is okay. I read that around these weeks you'll start to feel the baby, but I dont.

has anyone else experienced this?