As with any injury, there are various levels of severity. The most common way for a cyclist to end up with a broken collar bone is from breaking your fall with your hand and the shock travelling up your arm, breaking the collar bone. I broke mine against a car door frame in a high speed collision and as such it took about 4 months to completely heal. After about a month the pain had subsided enough to not be much of a hassle but it was another month before I could cycle with no pain.
My doctor told me that I could do whatever I wanted with it without worrying about doing further damage. In fact, he said that it was preferable to keep it active to ensure I wasn't left with limited movement when it healed.
Hope you have a swift recovery!