Today I went into the city centre to get one or two cosmetic things that just don't seem to be available anywhere handier.

It was a hot day, but I hadn't realised it when I set out and wore a heavy jacket and shoes with socks. I sweltered. Especially on the bus. And ended up taking my jacket off and carrying it.

I felt heavy and exhausted the whole time I was out. No reason of course. I haven't done anthing that would warrant feeling heavy and exhausted.

I came back and had the sandwich to eat that I had bought in town and read the paper for an hour. Then I got up to go and clean the car, because it is in for its MOT tomorrow.

I noticed something was wrong with my right arm. I could hardly move it, and it was tender like it had been battered a few times with a plank. Odd, I thought.

I went upstairs to get the hoover for the car. By the time i got to the top of the stairs, I was sweating and out of breath. I sat on the bed and tried to get my breath. I felt weak and very, very tired.

I went for a wash to try and make myself feel a bit fresher. I noticed then that my whole face felt tender when I washed it too. Especially around my eyes. They felt like they'd had a light blow from a fist! really, really odd!

It was then i realised that I now felt sort of tender all over. I pressed my other arm, my legs, my belly. I felt sore and tender. Though my right arm was the worst - it was hardly usable. I put this down to having my jacket draped over it earlier in the day.

I went on and cleaned the car anyway, difficult with a gammy arm, and that really set things off. I went dizzy and my tinnitus was going crazy. I went and lay down on the bed, took some painkillers, and felt like I was coming down with the worst bout of flu I had ever experienced.

I managed to sleep for about half an hour.

When I woke up I felt groggy.

I ate the evening meal husband had bought from the foodhall in Selfridges - a treat for us both for the rough time we have had lately. I felt better, but weak.

I went to the loo. I realised I was spotting. That would explain the exhaustion and the general pain.

Now after watching telly and resting for the evening I feel much better. My right arm just aches a little.

But what is this? What is this constant cycle of rapid illness followed by rapid recovery? It is just so weird. When it's at its worst, I feel like I'm going to be ill for weeks, but as long as i rest instantly it goes away.

The real worry for me is that if this "thing" was to come on at work, I can't go and lie on my bed for three hours to get rid of it, so what will happen? How can I possible think of working full time when my body reacts so violently to someting as simple as carrying a coat?