The baby is unbearable at 6 months old, crying and screaming, sometime…

The baby is unbearable at 6 months old, crying and screaming, sometimes doesn't respond when I pick her up... My calm child has become anxious...I put her down and she cries, we go to bed and she cries, if I leave her she cries... My nerves are on the verge of breaking... Have you tried calming her down? Or will this pass? Can't there be any proper guidance for raising a child at that age and speech development?