Feel baby’s movement

My first kicks was at 15 weeks. I didn’t know what it was at the time but all I knew was I’ve never felt that way before - it felt like a rolling sensation for me and I had the image of a washing machine tumble drying. I was only expecting to experience first kicks second trimester so didn’t think it was the baby and somehow convinced myself it was just gas haha. But I slowly realised it’s not gas cos it just felt too different from gassy tummy.