My DD (PFB!) is 16 weeks. She sleeps well at night, sometimes wakes for one night feed or very early in the morning hungry. She self-settles at bed time and nap times. However, when I put her down in her cot for naps she only sleeps for exactly half an hour and then wakes even if still tired. I have tried shush-pat, tried leaving her, tried rousing her slightly just before the half an hour but nothing works! If I put her down in her pram, she wakes after half an hour but with a tiny rock or walk she goes back to sleep and stays asleep for ages (currently 2.5 hours and counting!). Any ideas on how to extend cot naps or will it just come naturally as she gets older? Would you just use the pram and not worry about bad habits or keep persevering with the cot? Thanks!