So we have had a good run of sleep. Baby usually lies down, rolls over and falls asleep if we hit the time right. However now he’s learnt he can stand up in his cot. Every single time we put him down he’s standing straight up. He’s in a sleep suit and not steady on his feet so if we leave him to stand he falls straight down and bangs his head with an almighty thud then is inconsolable. So we’ve been going in and putting him down (over and over) which he becomes distraught. Even if we lie next to him on the floor he gets up and looks down over the cot bars! It’s hours of crying now. We’ve tried overtired, undertired, just right, one nap, two naps! Help!