Is that what I think it was?

I think I just felt my baby move. I am 19 weeks and I was laying on the couch and I felt this odd feeling in my lower belly exactly where he should be and it felt like a pulsing feeling but a little harder. Like more pronounced than butterflies. I think I felt him flip also because it was a constant feeling then it let go. I don't have much gas lately and I know what gas usually feels like and this was a different feeling. Was this possibly my baby? This is my first pregnancy.