So, just posting this in here as it's relevant.
Been ill all week. Was bad last Sunday and Monday, but thought it was just an accumulation of working loads and then getting ill at this time of year which isn't uncommon. Felt really fatigued.
Anyway, Tuesday felt a load better and was fine on Wednesday. Worked 12 hours each day though so was doing a lot.
Thursday afternoon just a huge wave of fatigue hit me. Never felt anything like it. Completely wiped out and had to give up my shift as I just needed to sleep. As my housemate works in a hospital, they told her not to go in until I'd got a test, so I tried to book a test but had no luck. I had no symptoms of cough or fever (which is what you need to get a test) - just fatigue, sore throat and migraine type stuff.
Yesterday was a fair bit better. Aches, less pain and more of fluey symptoms. Due to my housemate being a key worker, her NHS trust rang me and gave me specific instruction to get a test - so I could use the online system and not be lying, basically.
The tests must reset each morning as loads came up for me and I managed to get in at 2:30 yesterday afternoon at my nearest drive-in one (about 20 mins drive away).
Took about 15 mins all in, including queuing. To be safe, I'd avoided leaving my room at all apart from going to the toilet, and my housemates did some shopping for me in case I'd need to isolate. Felt rough last night but loads better this morning and, luckily, got a negative result back at 12pm (so a quicker turnaround than I expected!).
It's really hard to judge, though.
If not for my housemate being NHS, I wouldn't have been able to get a test, so would have been up in the air about self-isolating. Not that it matters much now in the grand scheme of things with a new lockdown (which is gonna cost me one of my jobs, again), but if I hadn't have been able to get tested then I'd have been locking myself away for another 9 days at least, and also thinking I could have had it (my friend who tested positive a few weeks ago had the exact same symptoms as I did, for example).
Clearly I've just had a bug and working loads will have taken it's toll with a lack of sleep, but still a bit worrying that the symptoms seem so different from person-to-person.