I think there is a relatively simple equation for whether we heal from emotional wounds or not.
The simple version is this:
Healing = willingness to heal > lack of willingness to heal.
When we want to heal more than we fear the discomfort of the process, we tend to find healing. It may take time, but there is healing.
We can add a few more components to the equation:
Healing = willingness face discomfort + trust in the process + right tools & good guidance > fear of discomfort + lack of trust + not so good tools
We not only need to be willing to face the discomfort, we also need to trust in the process, and we need the right tools and guidance. We need to trust we can find healing, that the tools are right, and that we have good guidance. And the trust needs to be based on reality.
We can add even a few more things to the initially simple equation: sincerity, honesty (with oneself), receptivity, and doggedness, a willingness to stay with the process.
Of course, if there are no results after a few sessions, it may be good to re-evaluate the process and perhaps find another tool and/or guidance. In my experience, if it works, we notice it relatively quickly.
The issue may not clear right away, but we notice it shifts and perhaps lightens and opens up. Smaller and more isolated issues can be cleared relatively quickly, but it takes longer for the more core and interwoven issues, perhaps even a lifetime, even if these too can shift, lighten, and be much easier after some sessions.
I am talking from my own experience here so I am open for this changing as I discover new tools and approaches.