For what its worth, stick to your schedule, don't play catch-up, it never works, and buy one of those neoprene ankle supports for your last few runs, may not help mend the ankle but might prevent any further injury.
Time for a bit of negative psychology, you obviously don't really like running, and have no competitive urge, not even to better your own times, never mind anyone elses.
So why bother?
Think about the above and perhaps you'll come up with your own answers - personally, if I want to just enjoy a run for its own sake, I always find a trail run, forget times, enjoy the countryside and usually find myself lost somewhere in deepest Essex.
You do like a parkrun! I run them occasionally, but never time them or care what time it says if I look at the emails.
I care more about races (or used to) and a 10K time is, perhaps, more representative of your running ability. If you trained for and ran a few of those, aiming to get under 45Min you might find your parkrun times get where you want them to be.
Am fairly sure its just a placebo, which is fine if it makes you feel better, and in Stilts case? Reverse placebo effect? never underestimate the power of negative thinking! "I've stopped taking the supplements, so the pain will start" and it does.
And I'm just behind MrM2, age-wise, and also supplement/medicinal stuff free, I think a healthy diet, tobacco free and alcohol freeish is quite enough.