You did not get good treatment. PY usually does not hurt. Yes it can ache a bit, but not to the degree you are experiencing. That is not normal for PT. I usually used ice after a session. PT usually starts with what you can do, and then gradually they increase your duration. It sounds like they pushed you to the point of pain. That is not good and I would have stopped at that point. I always felt really good after a session, as it was finished with a good massage to relax and calm the mussles. I loved PT and went because it felt good afterwards, a little achey, but good. I think that is what it should do for you. The pain your are experincing seems a bit much for after a session.
Ask your dr. if this is normal for you. good luck and I hope the pain decreases soon. ginnie