My 2 m old has difficulty sleeping in the day and cries out of frustration - the less sleep she has the more she cries - I have tried everything I can think of - cuddling her, leaving her alone, giving her a warm bath, massaging her, bouncing her, singing to her (makes her cry even harder!)she falls asleep only for moments at a time - the only things that works are the sling and the breast - but I now have terrible back ache and she wakes up when I try to burp her after giving her the breast! please help I am frantic!