Dreams After Fajr

Question: اسلام عليكم ورحمة الله وبركاته Do dreams after Fajr Salah come true? So my mum recently had a very detrimental dream in the current 2019 Holy month of Ramadhan but a few months ago from today, a valuable and dear aunty from the family passed away so my mum had a very similar dream except she was in that position as the aunty and the aunty's family was mourning my mum (which is odd) and she could not see me (daughter) in the dream near her but the aunty's daughters instead mourning my mum. All this happened when my mum was on her death bed in her dream (which was after Fajr) and could still sense her surroundings being dead. This aunty already passed away a few months before this scary dream. Please I am very very worried as I heard that dreams after or before Fajr often possibly come true and especially if they are from a person who is truthful and my mum is a truthful respectable person in the family. What does this mean? جزاك الله خيرا