Had pneumonia 2nd time in about 5 weeks which turned into Sepsis I think it's called. I was told if I hadn't have been found I'd be dead now which has shocked me enough to make some serious changes to my life. Never been this ill before and just want to get back right and stay right.
I had exactly the same last summer mate, I ended up in hospital with a temperature of 40.5 degrees and had to have a chest drain and all sorts. Never been so ill and it took me a decent while to recover properly after I got out of hospital.
Luckily I rang 999 in the middle of the night or I'd have likely passed out and that would not have ended well (I was in a hotel on my own)
Take it easy, don't under estimate what a hammering that is for your body.