Hi im a little confused haha. Im on my 18th weeks of pregnancy, when i lay flat some mornings or night, i feel a weird sensation its like tumbling spasm. its like a spasm but more solid and stronger. Bcos im getting spasms in other places in my body i was confused if this was baby? However ive never had spasm like feelings below my belly button. it feels like a tumbling sensation that lasts for 3 seconds and would happend 3 to 4 times in one go and stop.