If Provera doesnt work what are my options?

I was prescribed to take provera on May 25th for 7 days it has been day 11 and still no sign of my period. The nurse instructed me that my period was going to start after the fifth pill and then I would start Clomid on day 5 of my period but still no luck.  I am scheduled to have artificial insemination in two weeks  If my period does not start by Sunday I would be unable to have the procedure done and I have already made travel arrangements being that my area does not have an infertility clinic. Is there anything else that I can try since I only have two more days left. I feel really overwhelmed with emotions and I cant stop crying.