First time mom here. please help me!!!

I don't know if it's my baby moving, gas, or whatever. But I'm 19+3 weeks today with a girl. Due 2/7/17. I can't say I have or haven't felt my baby kick. I don't know what it feels like first of all. I'm feeling this popping sensation almost. It comes and goes. It almost feels like she is taking her finger and poking me from the inside. The best way I can describe it..... It will happen once and I won't feel it until awhile later. Those of you who have felt your baby move..... Is this what it feels like? Or is it just gas or something else? I wanna feel her move!! I've been dying to feel her but I don't think I have yet. Unless these popcorn sensations are. Help me please!!!!! I'm new to all this!!!!