My 15 month baby is constantly moving in his sleep! He is in a cot and goes from bottom to top then back down again, side ways, constantly turning and moving all night! He only has periods of 30-60mins when he may lay still but mainly moves every 10-20 minutes! We have tried sleeping bag, just blanket, pillow and toddler duvet but it makes no difference! He will then roll and knock himself on cot bars (health visitor said a big no to cot bumpers) and then cries for 5 seconds and then settles himself back to sleep! Sometimes he can cry out because of this 3-4 times a night! He goes straight back to sleep but me and husband then struggle to get back to sleep and are so tired the next day we get ratty! Any advice?