consider that it might be parasites - larva migrans.
i had something like this, felt like biting and pinching here and there on my skin and when i looked there was nothing there- no mosquito or bug to be found. i thought it was crazy until i stumbled on Curezone and read others reporting similar and said it was larva migrans.
sometimes it felt like little needles puncturing my skin, much worse than a mosquito bite
from your list there, garlic and especially oregano oil might cause this