I would never subject a sponsee to do a 5th step in stages or parts unless it was too long to cover in a day.They do the 4th step,from start to finish,we then do step 5,from start to finish.
I suggest you sit down and do it all at once and find a way to do it like that and put it to rest.
as far as a therapist,I never suggest someone go see one unless they have been thru the steps first,give the program a chance to work,give it a fair go of it