Question about different baby kicks and movements?

I'm almost 19 weeks now and I feel the baby kicking a couple times a day. Weird thing lately is, I feel the kicking going on lower in my abdomen. Before, it was light tapping about an inch or 2 below my belly button, but now it's just lower. I also noticed that the bump drop lower or something.
Can anyone explain to me these kicks??

Thanks in advance!