It really depends on your personal financial situation.
For me, I only need around 50k per year (before tax) to maintain my lifestyle and save a bit. That includes a pension (as if that will make a difference lol).
So going from 70k to 55k would be ... Uncomfortable (I get you with the stability anxiety), but rationally, if my mental and physical health were suffering. Those extra 20 % is really not worth being miserable.
You only have one life. Make sure to enjoy it.
Having said that, if it was going from 55k to 45k, I would have to have a close look at my finances and lifestyle to see what would be worth cutting. The end question is: are the things you need to cut to make do worth the extra suffering you are currently enduring?
Everything has a cost, whether that is paying with your time, your health, sanity, or choosing to spend time with one person instead of another. Only you can answer if it's worth it for you.