Was it the baby moving?

So I'm 26 weeks pregnant and have been able to feel her move around for the last two weeks but haven't been able to feel her from the outside yet and was told I would at 30 weeks, last night I was drinking some water and sitting when I felt her kick above my belly button, she was kicking really hard which shes only done once before, I put my hand where she was at and felt a thump, was it the baby? This is my first pregnancy so I didn't think it was possible for me to feel her from outside this early? Has this happened to anyone else before or was it just some other organ?