... this one remedies quickly.
I'm still suffering physical pain that is the same as I was experiencing through February and most of March. However the lethargy/inability to move has gone and without that the pain's mostly not too bothersome - about the same level as those first baby steps out of bed every morning after a hard run the evening before.
Thanks both & glad the lethargy has lifted Ricky! (you should see me 1st thing, on a GOOD day - bad back & v bad shoulder = cripple)