My 5 week old dd will sometimes sleep soundly and other times thrash around and fuss for ages, she seems to be asleep, eyes closed, but is so noisy, almost like she is grizzling in her sleep, is this normal? I end up having to pick her up because its impossible for dh and I to sleep. She doesn't seem to do it in my bed, but I don't want to co-sleep all the time, as I don't settle for worrying about her over heating.