After taking provera 18 days past and I still had no period. Called my RE and he said if I wanted to I could start clomid without a period. I didn't really want to do that but the next morning it came! wow it took 19 days post provera to start. has that happened to anyone else?? Im waiting for a call back from the doctors to get instructions on how to take the clomid. Im nervous but excited all at the same time!!!