Going 5 days without sleep would do that, regardless if you had sleep apnea or not, the body alas needs rest, rather hard to do when you cannot sleep.
My average sleep time is 5 hours a day, has been for the past 10 years, unless knocked out sleep assisting meds do nothing for me.
I may go to bed at 10pm, body vibrates for approx 3 hours keeping me awake, then I sleep for 5 hours, was scary at first but have learned to live with full body vibrations for past 40+ years.
The biggest reason people fail to sleep is anxiety or worry, it prevents the mind from switching off.
I find a simple solution to this and no it doesn't involve pumping your body full of drugs, all it involves is a set of headphones and white noise playing in the background, be that rain or wind turbines the latter I find more consistent than rain.
Calm the mind and sleep will follow

I have empathy for you with the sleep and ex issue. Lack of sleep for me is the biggest trigger for my seizures. Curious, did you have any seizures during your 5 days?