Sarah,

If you are going to go back to work, I suggest you start with a reduced day. Not a short day with a full day's decisions crammed into it. 500 emails will be enough to set you back days if not weeks. If you have occasional struggles with clear thinking, your job's work load will make it much worse.

What vitamins and supplements are you taking ?

A common problem people with PCS have is simple. They have a good day so they increase their activity level. Boom, they crash and have a bad day. Good days need to be respected as healing days, not activity days. Gentle stimulation on good days is OK, but pushing it is a risk. A week of good days means activity levels can be increased.

My best to you.