Hi!
I hope I can be of some assistance with this as I might just know what you are talking about.
1. Have you experienced any sudden "Growth-Spurts" or have gone through any sudden "Growth-Spurts".
2. The pain you experience at night, is it an intense "dull" penetrating pain.
3. If you were to run your hand up your leg, starting from half-way above your ankle, up to your knee, do you feel a slight "bump" below your knee?
4. Do you find it difficult/painfull to stand/walk for a long time, climb stairs or pick up heavy objects?
Seraph