Can you journal to a file on your computer that is reserved for the next session?

I had a period once where the crazy thoughts wouldn't stop. So I emailed the thoughts to myself over and over and over. Every time I had one, I sent an email to myself.

Then, I printed it all out and handed it to my therapist, who read it later. This was how I could communicate with her the depth of my downward spirals without making her have to deal with them in real time.

Edited to add:

I say this because if you are texting him that you want to die, then you might be in a downward spiral where your thoughts are hard to control and getting worse and worse. I've been there and I know it is terrifying. And in the moment, you just might want to be rescued. You need a place to PUT the thought, rather than sitting with it, and so you message your T because this seems to be the only person who can help.

(I'm extrapolating so please forgive me if I am totally off.)

Hang in there. It can be so scary, I know.