Hello, RachelB - I have read this thread with interest. I am a bit of an outlier on this chat site as I am an openly admitted occultist/esotericist.
Not a particularly popular pov to have - however, it gives me an often unique perspective.
From my stance on human development, our memories are related to our etheric body - also called the life body or energy body, which is the 'sheath' just one from the physical body. All the medical avenues you are following are solid steps to take and suggest both sincerity and genuine concern. Proceed with them - but also begin to explore other routes, like meditation. The answer to this personal puzzle lies in a personal exploration on profound levels. (I would recommend hypnosis though I am someone who is dubious of it's merits - yet it might bring something of interest forth).
Scrambled memories are not as uncommon as we think. Below is an example -
This would have occurred in the late 70's or early 80's. It took place in Arizona and was a news article. (I took special notice of it because of some memory issues taking place in my personal milieu). It seems there had been a murder with attendant unpleasantness that the police were attempting to solve - when one day a man entered the police station and confessed to the crime. The police took his admission seriously and he was placed in custody and thoroughly questioned. Of note was the man's absolute belief that he had done the crime and his vivid memories of having done the deed. More, the man was wracked with guilt and remorse - plus horror at what he had done. However, he hadn't done it. As the police questioned him - though they could not doubt either his belief or sincerity or personal horror and sense of guilt over it - it became clear that the man could not be the killer. In the end they released him and somehow the story made it's way into a news story.
What was also mentioned in the news article was that such things are not that unusual - though they are rare. Apparently, people do confess to crimes they did not commit yet which a person 'remembers' committing.
Luckily, your memory scramble is far more banal - though likely more unsettling because of that - but I am personally acquainted with a far more troublesome scramble that really unsettled a very stable person. I think these events are rarely discussed or pursued because of the fears that spring up around them - of being thought 'crazy'. I think - from what I have observed - the loss of security in one's identity is the most serious consequence of such a 'blip'.
The key lies in the nature of memory. The key lies in understanding - for me - the nature of the memory forces in the etheric life body. What would scramble 'electrical' impulses? What is the impact of electro-magnetic forces on the human being? There are so many questions. Have neighbors expressed any similar 'blips'?
Burnt's recommendation of a journal is a good one. This is what the person in my milieu began to do - though they had been keeping a journal when the scrambled events apparently took place. They were able to go into their old journals and find indirect evidence of the 'new' memories - however, in future, they wound up keeping more of a diary (as opposed to journal) wherein they kept track of who they met on a given day, etc.
a la Pepys diary from centuries back.
In the end, view this as more an opportunity rather than an affliction. Maybe you take an objective tack and return to school and start science courses and become a researcher in memory. Or maybe you go a more subjective - though no less rigorous - route, and meditate and discover the root and stem of the memory forces for yourself. Whatever you do, don't dissolve into self-abnegation. As the poet said: "There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy."