baby movements

I am 19 weeks 2 days with my third baby but I am feeling a little nervous because I do remember feeling movement around this time or even before. I have not felt anything that I am aware of. My first daughter is 6 years old will be 7 in May, my second daughter is 4 and will be 5 in October and this new baby will is due Aug 14, 2017. Is there someone out there that has the around the same age gap? Please help me feel not so worried! 😔