I fractured the lower part of my fibula near the growth plate one week ago, and was in a Splint for 3 days. 4 days ago, I got a short leg cast, and about 3 days ago, when i had it elevated my ankle didn't hurt, but when I put my leg down, like to sit normal or stand on my other foot, I can feel my fracture, like the actual bone, hurting and then an immense pressure feels like a vice around my ankle, the pressure fades after a few minutes, but as long as my foot is not elevated, my bone hurts. I had not discomfort before 3 days ago. Why does this happen and can it be stopped?