Baby movement at 17 weeks (a few questions)?

So I was slim with flat stomach before pregnancy and I felt the first flutters early. 14 or 15 weeks (only once or twice mind you)

The other night i felt 2 first real kicks i think?? it was 3am so cant really remember but they were like thumps. light mind you but still like thumps?

But I am 17 weeks now. The movement is still in my abdomen. When will it get higher?

Its always on my left side (mostly) how is thebaby sitting?

And last off, when should i be getting regular kicks (and it should be a concern if im not?)