If one has returned, don't be discouraged. These are the ones that will need hypnotherapy. If a thought WILL NOT erase, there is an emotional resistance from some level of you to letting go of this thought. You might then get a memory. If you do, this memory can be taken to a hypnotherapist.
MANY people try to be their own therapists.
This does not work. There is also a technique there for doing positive self-programming. Let me know how you do. Ask if they do regression therapy for blocks. If you can't afford that ones prices, decide what you can afford per week or month and offer to pay that amount and to continue paying that amount even after your sessions are done until the full amount is paid.