Kicks at 17 weeks?

El

This is my first pregnancy and I think I just felt a couple of little thuds from inside. My husband says he could feel it too. Is it possible that I can feel her moving this early? I've heard that there are flutters around 18-22 weeks, but it felt like more of a soft thud than a flutter. Is it just gas? If it was a kick, does that mean I'll start feeling her move around regularly now?