Thanks for your prompt reply,
I forgot to mention I have some minor back stiffness also in the mornings but not much pain in that region. It has all come post covid. I did have a previous episode of pelvic pain about four years ago, but that was linked at the time to a possible prostate issue and cleared up over a few weeks. I was playing football twice a week for the past year with no problem other than occasional Achilles tendon niggles. That has been a small problem over the past 35 years or so. But never too bad. You sound pretty confident it is not likely to be late onset AS. Possibly I have read too much about the condition online and convinced myself that I have it.
If you do not mind me asking, are you hearing of other instances of these types of issues post covid infection? Is still playing football at 63 regularly great? I am hoping to get back to sports again at some point. These symptoms all came quickly after what seemed like a mild covid infection. I had read achilles issues can be associated with AS, which fed my worry a bit. But they are only a few with long intervals and only as a result of playing football nonstop most of my life and not resting when I got injured. Like any football-crazy guy, I have had a few injuries over the years. I did try some Prednisone for a few days. I think 20 mg or less for five days but did not notice much change. They also did a lumbar spine MRI which showed a few nonspecific minor changes, possibly ‘suggestive’ of AS, but certainly not definitive.