My lo is about to be 6 months and has trouble sleeping. She will cry for hoooours in her crib. She has no ear infections, doc keeps passing off as if nothing is wrong. The only way she will sleep at night is being nursed in our bed and she sleeps like an angel. But the second shes in her bed she freaks out and even if we hold her she goes nuts. She starts thrashing and scratching us and we are lost. Is it that her crib mattress is uncomfortable? It doesnt feel very comfy but im not sure if all are the same. I would like to get her sleeping in there but after crying 8-11 nonstop we finally got into our bed. Help please🤪