Thanks for your question. My name is XXXXX XXXXX I'd like to help you out.
I'm terribly sorry to hear about this tragedy involving your son. It's not uncommon to go through this fog and have these feeling like he'll be back, even if he has been gone for some time now. It is all part of an extremely difficult grieving process caused by such a tragedy. Over time the fog will clear and you'll be able to go about your life again with your son's memory on your mind and in your heart, but in a more functional way. However getting to that point can be very tough, so I respect that you are reaching out for support.
Talking with your psychiatrist can certainly help. There are medications that they may be able to prescribe which will help you cope with some of this grief, and it can make life more manageable for you while you are attempting to recover. Some psychiatrists also provide talk counseling, however if you are not in regular counseling sessions to process the emotions that you are experiencing, that can extremely benefitial. I would also encourage you to look into some local support groups, or even online support groups, for parents who have been through similar circumstances. Often it is possible to draw a lot of strength and support from people with shared experiences, so while it may be hard at first, it can also be an important part of the healing process.
I definitely wish you the best with all of this. You didn't state a specific question in your post, and I want to make sure I am able to help you with your concerns. If there's anything else I can do to help, please let me know.