What kind of work/hobbies do you do, or any whiplash or accidents?
If any upper body / head hit, the c1/c2 could be misaligned (also called upper cervical or atlas/axis).
Have you been fully evaluated by an advanced PT person, or expert chiropractor?

Did the PT have you using stretchy bands, weights and that sort of thing?
Any focus on posture, or mention of what they are aiming for with your therapy?

Have you tried to switch to Aleve for a change?

And some slightly alternative health sites suggest long term Ibuprofen actually impedes the healing process.
When I read that I stopped them and focused on more natural methods.
vitamins & supplements- a good multi vit/mineral, B stress complex, Cal/mag blend, MSM, grape seed extract, magnesium & many more newer things are out now.

Got an infrared heating pad
learned about proper gentle stretches (Sharon Butler)
learned about manual trigger point therapy
all kinds of posture work/awareness

Here's one of our sticky threads that is full of 'crash course" TOS info - even if it isn't TOS many of the therapies might work for you -
http://neurotalk.psychcentral.com/thread84-4.html