My 6 mo dd always wriggles her head into a corner of the cot to sleep. This inevitably means that her arm or leg goes through the bars and she wakes up; also, i am afraid of her hurting her head.
So I have put on a cot bumber, which she loves to snuggle against, but I am now scared of her over-heating. Her room is VERY cold though, and she does usually turn har head away once she is well asleep.
She will be fine don't worry!
Good idea to put her in a sleeping bag to prevent legs at least going through cot bars though.
My DS has had a cot bumper since birth and always ends up squished right next to it.