Woah this shows how sleep plays a role in organizing memory, if your condition was restricted to sleeping. Interestingly the effect was similar to the other guy (memories fine but indexes missing). Did you contact any researcher/anyone contact you?
Those are just some articles from this past year but the specialist that I saw for sleep problems when this was all diagnosed wasn't surprised at some of the memory issues I had been having given how severe it was; O2 saturation was dropping down to around 80% for a large portion of the night, and never above 90%. I was also having 0-30 seconds of REM sleep a night from what I was told in the sleep study. Both the terrible O2 and lack of REM sleep account for what was likely happening to my memory. Sleep is definitely a huge deal when it comes to memory.