You have a wife and a fiance' ? LOL.

Try to limits the sounds/voice exposure at the social events. Being in a room with lots of people carrying on different conversations is very taxing on the brain.

About multitasking. It has been shown to be detrimental to healthy brains. Just because some brains tolerate multitasking does not make multitasking a valid way to work. If you need to drown out ambient sounds and voices, pick music that is something you know. The brain can easily relax to known stimuli.

I would be more concerned about driving in congested traffic. A longer drive without traffic congestion should not be too stimulating/taxing.

I am surprised your naturopath did not start you on a brain nutrition regimen when you needed help with anxiety. Anxiety is taxing on the brain and a brain with poor nutrition is more prone to anxiety. So.... brain nutrition should be a first step.