How about you join a study group like the Olympians or the Luminaries group? I have found that for me, a whole group to cheer you on for all your victories really helps. It also helps to see others who are taking it slow as kind of a green light for you to take it easier as well.
Most importantly though, your mental health is most important, so please give yourself a break sometimes
I went through waves of anxiety with reviews. Eventually I got to the spot where I accepted any delay in my level ups. By the time you hit 60 you will have done like 200k reviews, and the mistakes you make just aren’t worth your energy to stress over. You’re better off going at whatever your natural speed is, rather than imagining you’re supposed to go at a speed that stressed you out. Took me just under two years to hit 60.