Multiple baby movement symptoms, but I'm still not sure!?

I'm almost 16 weeks along in my first pregnancy and have had multiple sensations that I thought were perhaps the baby moving, but I'm not sure as it they aren't consistent, but I'm sure that's normal for this early on.

Anyway, starting a week ago or so, I've had a few major "pops" that weren't gas at all, and they were direclty in the middle of my lower abdomen. It felt like a bubble burst inside of me. Then there are what feel like small and then larger muscle twitches, all over my lower belly, not just in one spot. I also have had what feels like geting scratched from the inside, my dr. says this could be ligament stretching, but with everything else going on who knows? Anyway, I'm questioning it because everyone else I've read about says that it felt like fluttering, or at least only encompassed one sensation– not all of them! What do you think? Am I too hopeful or is it my baby doing acrobatic stunts (my last ultrasound at 13 weeks showed a VERY active little guy in there!)?