I swear my LO got hiccups when she was inside me - she still has them, although nowhere near as frequently!!! Luckily they weren't catching and I didn't get them!
I've had a few flutters and to me, they really do feel "fluttery". I don't think that's particularly descriptive, but it's hard to describe! Last time I felt proper kicks at 20 weeks and fluttery feelings at around 18 weeks. It's been slightly earlier this time, but I guess you know what to look out for.