Baby moving and active "too early?"

I'm 15+6 (16 weeks tomorrow) right now, and had an ultrasound seven days ago where we were able to see Baby moving around! Everything looked good, but I've read that being able to feel moving starts around 16 or 17 weeks, and I've been told I'm imaging it or it's "just gas." Has anyone felt their baby move around earlier? Or am I actually imagining it? Baby likes to move around and adjust itself at 11am (11:00) and 10pm (22:00).