Bleeding after Progesterone Challenge

I'm wondering if anyone who has been through this before can give me some info.  I just finished a progesterone challenge, and started withdraw bleeding in exactly 2 days (to the minute).  I won't get to see my OB/Gyn for a few weeks probably, and I'm the kind of person that will agonize.  Is this good news?  Is it worth trying an OPK this month?  When I was very young I had a problem with anovulation that resolved when I got older, but then I stopped having my period over the summer while changing shifts and under a lot of stress.  This seems like it's going to be a normal period.  The doctor said something about maybe just needing to kickstart my cycle, but I haven't read anything about it working that way online.  She also mentioned starting me on Clomid to try to get me to ovulate.  Any information would be great (and a great relief).