Well I had flu a few years ago with temperatures of over 40degs. I too could barely walk to the toilet next door to my bedroom and had to crawl to it in the first couple of days. I had short periods of time where I was delirious. I however did have periods where I could talk and make a phone call and type on a screen (though only for quite short periods).
People in intensive care who are dying sometimes have periods where they sit up/talk/type. My mother who was dying but got out of bed in the last few days and watched TV, played games with me etc. She died 4 days later, of course someone can post on here and have flu, what a bonkers view to have that you couldn't.
Op do you have anyone at all who can look after your DS? I could not have looked after my son when I had that particular bout of flu. I have looked after him with D&V bugs and other illnesses but as I was practically unconscious for some periods of time, I just couldn't have. Luckily DH was around. He didn't want DS exposed to my flu anyway and kept him out of my room, which I am very grateful for .
The worst of it was over in about 2-3 days for me, though it took me about 10 days before I could do more than stagger downstairs and sit on sofa to recover from the effort of getting up.
It also came on really suddenly for me, which is one of the indicators it is flu rather than a bad cold. I had no warning at all. I just stood up at work and felt dizzy all of a sudden and my very high fever came on within an hour. I had real trouble getting home in fact (only a short 10 min bus ride from outside work to practically outside my house) as I almost passed out
I did look after DS after 4 days as DH had to go to work which was hard enough but manageable I was really lucky it was a bank holiday weekend and DH only had to take one day off. I have absolutely no idea what I would have done otherwise, I tried calling a friend for the day DH needed to work but it was in the days of 'swine flu' and no one wanted to have DS as they were worried they might catch it somehow
I eventually went back to work about 3 weeks later.