When my brain gets overloaded, I switch modes? Think of some little physical or practical thing you want to do and invent an experiment for a week? There's a lot of things one can do for stress, pick one you are curious about (deep breathing, meditating, taking a bath, being mindful for 30 minutes, reading, etc.) and learn about/do it for just a week and report on it to yourself and your T. You don't have to "try" to do anything, just do something very small that will take your mind off its jumbled state and give you a little rest.

I like to read and write so journaling and getting back to journaling usually isn't that hard for me. Refrain from making it very structured or deliberate, just find a pad of paper and decide to write a paragraph when you wake each morning, something like that. Or, one thing I enjoyed was at the end of the day, write one phrase/sentence about the best thing you saw/learned that day or even come up with a "word for the day" and work to find or implement it.

Where your focus is, is where your head will follow. Think of 7 words you like or 7 quotes, whatever; I once did that with quotes and a vitamin pill; small plastic bags and took a vitamin and a "quote-for-the-day" and put them in the bag, had a couple weeks' worth, picked one at random each day and carried it with me, thought about it off and on during the day. You can do it with tasks, too; "make the bed", "vacuum the living room", "read/study 10 pages of my least favorite textbook", "plan and make a nutritious meal", "go for a walk", etc.