Some researchers suggest that causing a return of symptoms is a step backwards. At the very least, it causes a delay of recovery.

I would suggest trying to figure out if you are subjecting yourself to triggers, such as reading too much or reading over-stimulating information.

Something that you can try is this simple trick. Use blank paper to cover the text above and below the section you are reading. This allows your brain to process the relevant information without having to pout effort into ignoring the rest of the page.

Filtering is a common dysfunction for PCS. By this I mean, the brain sees the whole page of text. It has to filer out the lines that are not the focus at the time (lines of text above and below the line that is being read.) This filtering effort uses a large amount of brain power.

So, try this trick for a few days and see if it helps.

btw, If you find that you tend to reread lines before they make sense, your brain is likely not ready for study efforts.

My best to you.