Are you talking about a road bike e.g like in the tour de France type of riding?

Formthotics are a great starting point and if they are assisting then this is telling you something about the potential cause of the problem - i.e. faulty mechanics. You really need a good sport's physio or trainer to follow you in the car with a video camera so you can look at you normal mechanics. Don't alter them for the camera and make sure you film at the end of the ride and on the hills, in and out of the saddle, when you are tired.

Often the gradual breakdown of connective tissue is not painful. Until one day enough is enough and the brain says to you "enough already" I'm going to give you pain. This means the injury had taken a long time to get to the painful state and it will take a while to return to normal depending on numerous factors: diet; training schedule; biomechanics etc. Maybe if you video yourself and put onto you tube then we can link to it from with this post and provide you with more feedback