Still nothing...

Well it is day seven after having finished the Provera. No period, but my boobs hurt, and I am still kind of cranky. What gives? After doing a little internet reading (never a good idea), I am wondering if I don't get a period in the next three days, I should request to try prometrium instead? Why wouldn't you get a period after taking it? I couldn't find any explanation as to why, except that I might be pregnant. I highly doubt that's the reason it isn't working. Do I just try it again? What happens? I sincerely hope I get my period in the next 3 days, or I am going to freak out!