Well to be fair its completely unknown if its possible to have someone that is sensitive to low frequency EM fields. Even microwaves could theoretically cause thermal gradients in the brain, which could effect functioning, though it is expected that with all the circulation that occurs in these regions and the thermal time constants the effects are rather small, despite the fact that they are way faster then anything in our body.
Personally, if I had the money, I would shield everything, including power lines (probably use DC here) and hardwire everything... if only to make scientific pursuit easier
You could try to live in a radio quiet area for a while, to see if you feel any different, but your mood is very subjective to so many things that its difficult to isolate factors that are probably negligible like low strength electric fields.
It does make me wonder though, if something in the brain could go high impedance somehow and be effected by fields, I am sure alot of people here have seen this on fried transistors.
I would say that it is a good conjecture though that, at least harmful effects of electric fields are blocked, due to the fact that life evolved with natural RF noise sources like lightning... but the present day situation is a bit different.
easy for engineers to yell that nothing is wrong, but im sure chemists said the same thing about certain pesticides etc.