I can only echo what others are saying, hopefully John will find a satisfactory outcome in all of this unpleasantness.
This weekend did a Parkrun (23:09, during which I walked about three or four times and had to stop at one point to stretch my dodgy leg). Promising, despite all of that, as 22:30 should have been well within reach otherwise, which would be a step in the right direction (finally) on the way to my 2018 5K goal of getting down to 22m.
Earlier today did an 18.5 mile long slow run which was disastrous from the out. Started out with my Garmin not starting properly - maybe 500m not recorded - then, the dodgy leg feeling, well, dodgy and tight, and then the new trainers hurt for a few miles (fortunately this receded). And, from about 10 or 12 miles in, my old mucker the groin discomfort showed up to really piss on my parade. Held planned pace to about 20K (i.e. at 2hrs) but then struggled for the last 10K or so, some walkie bits resulting in me coming in at 3h06m for just under 30K. That in itself is no real disgrace - miles on feet and all - but how sore I felt afterwards, even now, just is wrong. Wrong wrong wrong. May rest up during the week as a half marathon next Sunday, and I don't want to miss it...