I am very sorry you're dealing with so much stress right now; the good news is that there are endless ways of managing stress.
You'll hear a lot about journaling, acknowledging the feelings but not having any attachment to them, meditation, and more. These are only suggestions with varying degrees of success based on the practicing individual and what works for them. Ultimately, it boils down to what best relaxes you. Personally, as I've been feeling anxious in situations where it is not productive (e.g., during the work day or yes, needing to fall asleep), I'll focus on a random but pleasant topic such as balancing chemical equations from my school days. I love them! The equations distract me, relieving me of my heightened emotions and giving me more time to calm down in the moment. When it's appropriate for me to start thinking about the stressful situation again, I ground myself, lay out all the potential options, and focus on what it's in my control. It took quite a bit of practice for me to nail this down, but it works and allows me to make far better and more thoughtful decisions than I do in panic mode. As someone who has dealt with OCD since childhood (diagnosed), I completely understand ruminating and reassurance seeking. My mother and best friends know to call me out on it and remind me to take a deep breath which is also beneficial to me. Sometimes listening to deep music or prayer disrupts my sympathetic overdrive; the latter is a prime example of something that can immensely help one person, but mean very little to another. And that's okay!
Is the discomfort you're concerned about stemming from mind-body symptoms or something else? What helps you relax? Do you enjoy music, spending time with an animal, balancing chemical equations, or something else? Sometimes it's easy to get "hooked" on worrying - it's another habit we have to try to break out of. It took me literally decades to recognize that rumination leave me with less control, not more. There is always hope.
