I'm about 16w5d. When I started feeling movement about a week or so ago, I felt certain, unmistakeable movement, no flutters, but definite roll, twist, kick feelings. It doesn't happen constantly but it is still odd. I expected it to start with flutters, slight movements, etc. And the movement feels higher than I expected, sometimes around even with my belly button.
What kinds of movement are you feeling and how far along are you?