If you scored well above average across the board, it sounds like your only issue is head aches. I suggest you forget about 'brain safety' except at a normal and reasonable level. The anxiety will be worse for your brain than any daily risks are.

I have very low scales for memory but my intelligence scales are still very high. Many who suffer brain injuries lose memory skills but suffer minimal losses of intellectual skills. Memory effects knowledge retention and processing of multiple concepts. There are many ways to work around memory dysfunctions, if you ever experience them.

So, be glad you have your intellect and stop being anxious so you can maintain good brain health. A brain that is constantly ruminating on meaningless issues can not be as productive as one that is not stuck ruminating on such meaningless issues.