with the hiccups yes, I feel the low, like a rhytmic pattern but just at the bottom. I just push on the hard part and my whole belly was moving, I felt her on my both of my sides and a bit at the bottom, lol. Too funny. But did I hurt her? I don't want to hurt her :-(
It does all sound normal. To tell if it is the butt or head, push on that big bump. If it is her bottom her entire body will move when you push on it. If it is her head, just her head will move if you push on it. Most likely it is her bottom and the movements you feel on your sides and the top of your belly are because her knees on her chest so her feet can kick you near your ribs.
One way to tell if she is head-down is when she gets the hiccups. You'll feel them near your pubic bone.
Sounds normal you probably are feeling the butt up top. As they run out of room the movements are just different. I remember when my son went head down my pregnancy was so uncomfortable after that I got kicked in the ribs, his head was on my bladder, and when I sat down it felt like I was sitting on his head.
It doesn't sound like you have anything to be worried about. Feel better.