Hey there. I can't say I have experienced anything like that with my own dissociation.

However I do think that if you are correct in saying that you *literally* cannot sleep (meaning that you have not actually fallen asleep at all for a period of time longer than 48 hours)

and

this inability to sleep persists despite your best efforts

then I think you should seek medical advice as soon as possible. Sleep deprivation is a very serious issue and can seriously impair your ability to function as well as potentially causing hallucinations and other serious symptoms.

If you haven't slept at all for more than 24 hours you should never get behind the wheel of a car ... studies have shown that although you are not legally impaired you are as functionally impaired as a drunk driver.

I think you should definitely seek medical advise, especially if - as you say - you are not able to get any sleep at all.