This is going to be a moan full of selp pity, so feel free to skip right over it.
After Monday's crappy run I took Tuesday and Wednesday off from running, and feeling on top of the world I set off today on my speed interval. Following warm-up I jogged gently for one km, and then did intervals with 1 min fast, 2 min slow. The first three intervals went perfectly well. Towards the end of interval 4 I had a "niggle" in my right leg, and a few seconds later a nasty pain. I stopped. Rested. Tried walking slowly for a few minutes, but it was more limping than walking.
Turned around and limped slowly back the 3 km to home. Have been sitting with a pack of frozen veg in a towel wrapped around my leg for the last 20 minutes, and have just slipped into my super sexy compression shorts and have put a knee compression tube thingymahjah on as well. Taken two NSAIDs that I've got laying around for when my gout rears its ugly face (happens a LOT more rarely after I started to run and lose some weight).
On the 19th October I am running a half marathon. I was planning on pushing myself hard(ish) for two more weeks, and then have a two week taper before the race. Instead I'm sitting here thawing our vegs and feeling sorry for myself. Having read up on hamstrings, I think the "pushing myself hard" is over and done with for the time being, but am still hoping to be able to get some gentle recovery running in soonish and still get ready. Let's see how it feels in 48 hours. Please keep fingers crossed.