@sunshine45
Hi there,
Sounds like your a very lucky young man. I can relate to your memory loss. I lost all my memories from age 15 back from being in a coma from seizures. That was 51 years ago. None of those memories ever came back. I suffered from Retrograde amnesia which is the loss of current and previous memories. Although I believe in miracles at this point I doubt any of your memories will return.
My first thought is Anoxia or lack of oxygen which can cause memory loss. I’d assume your oxygen loss was severe or your memory probably would have returned by now. In mild hypoxia memory loss is usually temporary.
Another possibility may be Anterograde amnesia if your hippocampus was damaged in both hemispheres of your brain.
Anterograde amnesia is an inability to form new memories whereas Retrograde is loss of existing and previously made memories.
Have you seen a Neurologist and had an MRI or other imaging of your brain?
What do your doctors say about your memory loss?
Health and happiness,
Jake