Hey there Rhonda!
I'm so sorry PT isn't working for you. I had a very similar experience. The first rheumatologist I saw sent me to PT because she did not believe I actually had AS. I do suffer from DDD as well, so she thought that was the source of my pain.
I also began in aquatic therapy and I felt the same way. The pain seemed to actually worsen, and after 3 sessions I went and saw a spine specialist. A week later I was diagnosed with AS by a different rheumatologist. They had me stop and I haven't been back since.
If you haven't already, I definitely think it would be a great idea to let your doctor know how it's going and maybe he/she can decide whether or not to continue or discontinue treatment.
Best of luck to you! -Katie, Team Member