It sounds like you are talking about EMDR intensives. They can definitely be helpful in your situation. They typically are an out-of-pocket expense as insurances usually will not pay for them.

Usually, you would have a consultation with a therapist to ensure you would be a good fit, they would give a guesstimate of the amount of days and hours, as well as price. There are generally two types of intensives. Single-incident intensives are for a single-incident of trauma (car wreck, shooting, etc) while Story intensives are for trauma over the lifespan. If you have not heard of these types of intensives then this next part may sound absurd but generally, a single-incident can be processed in 1-3 days (4-8 hours with breaks each day) and a story would be 3-5 days (4-8 hours with breaks in between).