As Lady Neon and Santosha are saying, it’s a normal, developmental stage. Babies are not designed to be alone - they need their mother or another care giver. they need help from you to calm down and lear the world is a safe place. What do you do when she is like this? It’s OK to hold her while she sleeps or pop her in bed with you so she know you are right there for her. Babies that are held close grow up to be more confident adults.