This does sound very serious and frustrating for you- I cannot believe that you are still without a definitive answer as to what has caused the muscle fatigue. I hope that the allergy clinic can give you some answers.
I know that in some countries there are specialist physicians who specialise in diagnosis- not sure if such people exist in the UK?
It does sound viral but then blood tests should have showed something.
Two years is a long time to be off running- I don't know how you can cope mentally!
How is everyone else going? I managed a 25 minute road run on Saturday morning (very carefully and gingerly) and all seems ok, but did get some ache in lower ankle of other foot. The endorphins were just kicking in but I made myself go home and did not push things. Luckily I was going to the chiropodist anyway, so he has adjusted insoles accordingly and we will review the situation in two weeks. I am now proceeding with caution and will try another short road run on Tuesday, all being well after a gym visit on Monday.
Alarmingly, it seems my left leg is ever so slightly shorter than the right (apparently quite normal!), which is likely to account for the problems I have been experiencing.
Whew- The rain and grey sky is depressing me and my mood is not improved by the fact that I am going to gym again after work for another boring indoor session because I have been off running for about 2 and half months now!
It is all a tendon issue that relates to my gait- have had several visits to a foot doctor and now have special inserts for shoes. I have also had many (expensive) physio treatments and acupuncture. Unfortunately there is an element of trial and error with the inserts because it was either the big toe needing support, or the little one. After 3 weeks we have concluded the wrong toe was supported and so of course this has furtehr delayed recovery.
I keep seeing others out for runs and am very envious and frustrated. I can certainly sympathise with all the angst expressed on this forum!