In a 1-cup measuring cup, add 1 Tablespoon of fresh lemon juice. Top the lemon juice with skim, low fat or whole milk. Stir and let sit for two minutes. After two minutes, your milk is both acidic and curdled. If you need 2 cups of buttermilk, add 1 tablespoon plus 1 teaspoon of lemon juice or vinegar to the milk.
Larger broken bones, for example the bones in the thigh, or both bones of leg would take a great deal longer to heal, usually six weeks to three months in the average healthy adult. Begin physical therapy as soon as is practical. That will help.
Try to avoid using that muscle if at all possible, or at the very least avoid engaging in the activity that led to your injury (running, lifting weights, etc.). Avoid strenuous physical activity as much as possible for the first 48 to 72 hours after sustaining the injury.