The first couple times I thought it was just gas bubbles, but I knew for sure when I hadn't peed in awhile and I would all of a sudden feel like I had to pee more but only for a minute and after feeling that a couple times I could tell when it was baby kicks. If you feel something shortly after eating or drinking it's most likely baby movements too. Also to me it's kinda like a muscle spasm, like when when your muscle twitches for no reason it kinda feels like that in your belly.

mine is to. im 19 weeks. what dose it feel like to you? i dont think ive felt baby yet