Contusion on top of foot

  I injured my top foot the first week in October and the podiatrist diagnosed it a contusion.  Initially, there was a very very slight bruise, but that went away and there was hardly any swelling.   My foot is still not completely healed. I can still feel it slightly when I run but not when I walk (I tried to run again on Monday. Has anyone else ever had a foot contusion?  If so, how long did it take for it to completely heal?  Is it okay to bike still?  It's really frustrating!