If you are starting pelvic rehab, you may want a date for when it will be over. The answer is not a single date.
The time frame in plain terms
Cleveland Clinic says it may take a few months of physical therapy sessions to notice symptom improvements. So plan for months, not days, and treat early sessions as the beginning of a longer stretch.
Free reading to set expectations
Cleveland Clinic's page on pelvic floor dysfunction, its symptoms and treatment is a good first read. MedlinePlus has a page on pelvic support problems and the pelvic floor.
What you can do now and what needs a professional
The cheap step is to keep a short note of your symptoms so you can see changes over weeks. Choosing a rehab plan is not a do-it-yourself matter, so let a licensed clinician set it.
Start with a question
You do not need to know the exercises or the terms to begin. Ask a licensed clinician how long rehab might take in your case and what you should expect along the way.