That's probably been the second hardest part. Was going through that with my T last session.That will keep you in the processing cycle, but also give you some breathing room to regroup?
Knowing when reprocessing ends is difficult at first. You really need to monitor and know your self to figure out when you are reprocessing and not. Cognition is a huge indicator for me. The ability to do things without "brainless" mistakes like grabbing the wrong thing from the fridge, remembering what I'm doing, being able to go to the washroom AND grab a fresh water bottle in two or less trips....
So when I am done hard reprocessing tasks I usually want a break for a week or two at least. Sometimes it's good to look at what is coming up on your calendar too. Holidays (family-even when its good its not great ), medical and dental appointments, trauma anniversaries, and anything stressful you need to do and lay off the reprocessing for a session or two until we are past that.