My Husband Could Not Sleep Well. He Is Regularly Complaining

My husband could not sleep well. He is regularly complaining that he is afraid of the financial problems he is going to face in future. I could see nothing like that in the near future. He is 51 years old. He is sitting and talking to himself and telling that he is very afraid. Whom I should consult to make him come out of this situation. Eating less and had come down a lot