Regular movement? FTM

Paris
So I know everyone says it's normal to feel baby later with the first, but when did you start feeling little one? I felt my first kick at 16/4 and it was every few days for a bit. Not I'm 18/3 and I feel her a TON. Have for over a week, consistently. I saw her move from the outside yesterday. Are any other first time mom's feeling this much this early?? 
Also, I've never felt "flutters". It started as a kick or punch and that's what it's been. I know the difference with gas. That's why I'm just a little surprised. I also only weighed 110 pre and I'm 5'3"... Small frame thing maybe?