Thanks for the update. It is good that you have some concrete information with which you can proceed.
Just to note, you can have priformis tethering in the buttock wihout pain in this area. Also, recent research indicates that discal bulges and other spinal changes need to be classified as moderate or worse before these changes are likely to give symptoms. In other words, it is possible (probable) that small and small to moderate changes although showing on scan my be symptom free.
I do not know the extent of changes showing in your case, but it is reasonable to assume that if a nerve root shows signs of compression some symptoms will occur.
You may benefit from conservative treatment eg more physio appropriate to the diagnosis, and / or non steroidal anti inflammatory medication short course is an option. If this does not assist I suggest that a referral to a Specialist able to provide a guided (image via scanning) steroid injection to reduce irritation in the area is an option. If all else fails then surgery to decompress the nerve would be the next step, but only if it is definite that you are having reduced motor function (loss of strength with wasting muscles, decreased reflexes) or worsening sensory changes.

Please keep us informed of your progress and best wishes for a full recovery.
MrPhysio+