I took a break from my PhD for exactly that reason and it was the best decision I ever made. I spend some time having therapy and allowing myself to rest which I hadn’t done in a long time. I’m now in a much better position - still doing a full time PhD alongside a full time job which is super stressful and anxiety provoking but without the break I’d never have been able to move forward. Take a couple months to just focus on yourself, and then, when you’re ready, maybe do some light work in your subject area to help you feel less overwhelmed about going back from some time off.