My roommate says she is hearing some voices and seeing some things nowadays. She has lost her uncle 4 days ago. She cried a lot. Yesterday she said to another roommate of mine that they argued each other which had never happened.

And this morning we were at the bus. It appeared to me that she got scared because of something. When I asked her if she was all right,  she said "someone hold my arm and I saw his hand." No body touched her. 

She has just gotten out of the bathroom, her face was pale. She told us someone called her name when she was taking bath. "I asked if it was you, but there was no reply."

I am so confused. Are these normal when you lost someone you love so much? What should I say to relieve her?