in jan routine blood tests showed my TSH was non-existant, T3 and T4 were then fine.since then my T3 and T4 are now outside reference ranges. saw my GP who suggested I was stressed. I am confused. I finding running difficult (breathless), climbing hard (sweaty hands) and yoga (trembly) all difficult. a year ago I was running marathons now I can barely run 6miles. what do I do? am I paranoid?