If Clomid works properly, you will always surge on
CD 12 within a day or so, and ovulate on
CD 13 or 14. The period will then always come on cycle day 28. (this is if you took clomid on CD3-7)
It sounds like it didn't work this time around for you.
If you don't ovulate, you won't get a period.
If you were my patient, I would start you on some progesterone to start you period.
I would then follow you with ultrasounds through the next cycle to see how the follicles are developing.