Anything you can do to give your brain optimal functioning power will be helpful, including B vitamins.

I'm also back to work part time, and I found that, like most things, it took a while for my brain to "break in" to the new activity. I'm having to rebuild the teaching pathways in my brain gradually. This can lead to increased symptoms and fatigue. Pushing past them is okay and even good as long as they don't become too overwhelming. As I do so, they get less and less over time.

Do take it easy in other areas if you can -- try not to overload yourself too much at work and home and volunteering all at once, for instance!

Good luck!