I know this might sound strange, and it's not even my first pregnancy, but when the baby started moving around last week, ever since, I've only felt the moves and kicks on the left side, quite low down. I remember with my other baby, it was quite central, or in different places, it's only in the one spot. I'm worried there is some obstruction of some kind and the baby doesn't have enough room to move around. Has anyone else noticed this?