I know what you are saying, having lost my entire "nuclear" family in span of two years some time ago (my younger brother and both parents) along with my marriage, same time frame (my mother actually survived, and I cared for her, but immediately upon my father's death I realized she was demented, and her decline was initially so fast that she didn't know me, her grandkids, was paranoid, etc----so there was no time spent remembering together...grieving together...) Prior to that, both my parents were always healthy, active, my son declared they would "live forever"...)
I too still recall, and miss the voices---the phone calls that will never come, the letter or card that will never arrive again---and I am living with all their stuff and trying now to sort through and get rid of the "things" so that I can have the last part of my own life for myself and my grown children and grand child --- hopefully more to come---
I don't think these events ever end, they change, ebb and flow like uneven tides---
and there just never seems to be the "right" time, or "enough" time to "deal with" the losses---I sometimes think I could do something if time could just be put on hold for a few days---I find being out in the woods, camping, the best therapy for me.
I think I also find the losses complicated by knowing almost no one who knew them all when they were alive and healthy; and knowing almost no one I knew when I was married. It makes me feel very alone with the losses. And I don't want to burden my kids who are healthy and living their good lives.
...If you are one who can develop rituals that may help (lighting candles at certain times, a nightly 'prayer' that includes them all, planting ---- my family member's ashes are in my garden, and there is some comfort in sitting near the spot chosen; and I plan to take some of that soil with me when I leave here.
I also find that any loss recalls earlier losses (the friends/family who died young etal) and can threaten to drown a person...
But it is all part of life, in this society I don't think death or dying is talked about enough in ways that help one to cope---there was always a lot of denial in my family and friends.
So sorry for your losses. Do allow yourself to grieve freely if you can, I think that is the best "medicine" -- that, and the natural world away from expectations...