Oh my goodness! You may have broken your collar bone?? That must be really painful! Do you know what you did to injure it? Are you taking any anti-inflammatory medication or pain medication to help relieve the pain? You can always call your doctor and see what they recommend in the meantime before your appointment. He or she can suggest hot/cold packs and some over the counter meds in the meantime.
Please let me know how you are doing!