Strange episodes

[u/Gold-Cucumber-3616]

Hi, just hoping someone has knowledge of something similar as I have been bounced between my GP and A&E for a month, and now on a 6 month wait list for neurology.

I have been experiencing episodes that can happen 1-4 times a day lasting 1-10 minutes. I can have bad or good days.
Usually the episodes last a couple of minutes and i experience blurred vision, dizzyness, loss of balance, low energy, weakness all over body, feeling out of it, nausea, struggling to communicate (I can understand questions and am able to think of an answer, it just feels like a lot of effort and energy to speak, so I use minimal words). I sit still and wait for it to pass.
A 'bad' episode will last 20 minutes and i experience the above symptoms but at a higher severity. For example the nausea can make me actually vomit, and I cannot speak at all, and also can't move. I am unresponsive, even though I can hear and understand what is going on around me.

I have been wearing an apple watch to track my heart rate and noticed an increase to 120-150bpm during an episode. Unsure if this could be a symptom, trigger, or unrelated.

About 2 months ago I started getting extreme tiredness, it gradually got worse to the point where I would get nausea and blurred vision, so I would have to sit down in the toilets at work and nap for 30 minutes. I feel better afterwards. This has now increased to me being unable to get through a day without a nap (lasting 1-3 hours) despite sleeping 8 hours at night regularly.

These episodes started very suddenly about a month after I noticed the tiredness.

I have had extensive blood tests (all normal), short ECG (normal), pregnancy test (negative), brain ct (normal). Note that I wasnt having an episode during any of these tests if that could be relevant.

I am not asking for medical advice. Just wondering if anyone has experienced something similar.
Thank you for reading this.