Day 5: I'm delighted to say that the ice-pick headache is now over! The mil-spec painkillers can be packed away again in readiness for the next problem that consumer grade stuff won't help with. Remaining is still a fever and a general feeling of malaise and weakness. My appetite is returning at least, but I still feel like I've been hit by a truck. Still no respiratory symptoms, so I guess I should count that as a plus.
The postal system is certainly messed up, but working very slowly.
I ordered an ESR meter from Peak Electronics in the UK on the 30th of March and they shipped it out via Royal Mail on the 31st. It left the UK on the 4th of April but was only scanned as "arrived in Sweden" by Postnord on the 9th of April. Still no movement since then. It'll turn up sometime later next week I guess.