my doctor told me that if i took a couple pills and af came, i could stop the medication. if i was on pill 7 or 8 then i should just finish the course of provera ( i didnt start until 3 days after the last pill). and he also told me that i should treat it like any other cycle. (first day af comes as cd1, etc..)
i was worried that my next cycle would be long like the last one, but it lasted only 31 days

back to my average
i hope this helps, good luck to you