just have calm and peaceful place for your child to sleep. identify for what the child gets irritated, because the solution is in your hand. some child get irritation for
bet wetting in night(look at diaper she is wearing, because wet garments also irritates)
some texture of dress
the environment may be clumsy with too much of lights or sounds,
look at the surface where the child sleep.
if so, avoid those thing. give her a dim light, use mild melody music, use cotton bedsheets . explore the child with toys. even still the sleep is disturbed, consult your developmental pediatrician
. check for normal developmental milestones.