I understand that 531 has built in to it the workload that leads to not stalling. Yet every week except the de-load week I freak out as I step up to the bar to punt out some reps at a weight I have never been able to lift before.
I get apprehensive and attitude seems to matter. If I go in with a “F the world” vibe I seem to hit my reps. Last night however I let doubt creep in and only just pushed out the last rep.
Better rest, more food, better attitude required. I love and hate the progression.
Having a rep goal that is going to be a challenge is a good thing IMO. Visualise success going in, remind yourself that you have put the work in and be aggressive (for whatever aggressive means to you).
Confidence will come with success and success will come from good habits.
Do you have a job/family? Maybe you don’t have much else in your life to occupy your thoughts, so you are over-focused on 531 and letting it upset you. Another option is just to run 5’s PRO so you don’t have PR sets to stress you out.