Yeast interferes with nerve function, they proliferate at the connection of the nerves and the transmission is no longer accurate.
I had great result with amino acid - L- Taurine. On an empty stomach.
Do you sleep well? If not yo benefit from a few more amino acid
You mentioned: "Anxiety and stress easily triggered by trivial or petty issues"
I recommend a thorough B complex supplement to help deal with that ideally : Advanced B complex from AOR (this brand simply because that is the one my doctor recommended and it made a big difference - I believe it is the extra B6 and B 12 which made the difference.