We are cheering you on- I know what you feel like now.
One step at a time. You will have a CTA to determine blockage or not.
You are addressing your pain by seeing the pain specialist again. When you think about the cause of your pain, the most likely origin is the celiac plexus. The pain specialist should be able to tell what nerves supply the areas that are painful.
Don’t think further ahead now- it will just cause unnecessary anxiety.