It's kind if important whether you develop long covid or not. If you don't then you don't need a long break, if you do, you could be out for months or forever.
Not really, they're basically the same thing. Except hopefully you (eventually) recover from long covid. If you don't recover, it's medically indistinguishable.
Like CFS, "pushing through" can worsen symptoms - permanently.
It's been 4 weeks since I got sick and I still feel tired and unwell, but it's not anything as extreme as not being able to take a short walk, I even did some lightweight cardio-type exercise and there are days where I can be working almost all day (pushing through). I'm not sure what I should do and I will try to research it, but I feel like I have to push as much as I can while allowing more rest (i.e. 10h/day sleep, 1h nap in the mid day) until I'm well and trying do some lightweight cardio every day and a short walk. Reading the comments I have some fears that I could make worse / permanent though.