Most bulging discs will respond to PT over a period of 8-10 weeks. The key to the PT working is really up to the patient.
That is, the Physical therapist can work on various aspects for you with heat, ultrasound, message and electrical stimulation.
Help you to stretch the muscles and show you good solid exercises to help strengthen the core muscles and be sure you are doing them correctly.
BUT, the real key to all of this is YOU. You must follow through with doing the exercises at home and do them faithfully every day and as many times a day as the physical therapist tells you to do.
Believe me when I tell you that he physical therapist will be able to tell if you are or are not following through at home with the exercises.
If you are not doing them, you will continue to stay tight and show no signs of improvement.
Even if the PT doesn't solve the problem with the disc, you will be able to strengthen the core muscles that are so important to have. If you do end up needing surgery on that disc, the work with the PT will make recovery from surgery easier for you.
Surprisingly enough, physical therapists have told me, so many times over the years, that more than 50% of their patients do not follow through with exercises at home and never fully recover from any kind of injury because of it.
That is something I will never understand.
Good luck and let us know how it goes with the PT.
Fran