Fear of losing mother

Patient: Dear Doctor,Blessed Sunday.My son is 9 years old and recently he is afraid even if Im 1 min late to home. He imagines a lot that I may get accident , die etc. He cries all the time that I may die . We have prayed about it , strengthened him, assured him, but still he is so afraid. Kindly help . Thanks in advance.

Symptoms: Depressed, worried anxious, fear , crying