I keep getting this weird crack in my leg when I move it. It sounds like a joint being cracked (such as knuckles, etc) but it's on the front side of my lower leg, slightly to the right, directly between the knee and the ankle. It will crack pretty loudly simply from me tensing the muscles in my leg and pushing downward (like when I get up after sitting). What in the world is this? There's no joint there so I don't know what's making that noise.
It is possible that you have broken your fibula. That bone is not weight bearing and is the smaller of the two, so breaking it and being able to still walk is possible. Better go get an x-ray.