Don't worry. This is my first pregnancy, and I didn't feel any movement until I was 20 weeks. It's a strange sensation, and different women describe the feeling of movement differently. For me, it wasn't like butterflies or bubbles popping - it felt more like odd muscle twitches. It might take you awhile to realise that what you're feeling is your baby moving, but the more you feel that same feeling the more confident you'll become that it is bubs moving. I know it's really hard waiting for those first movements, but don't worry - they will happen .