Here I wrote about my experiences with the soul of my lover when she was in this period you ask about here, which for her, was prolonged. https://medium.com/write-under-the-moon/how-i-helped-my-heaven-mate-crossover-to-the-other-side-e4d91b448e0b

I'm glad your son's soul was given the opportunity in his own way to tell you that he's always with you.