Hi!
I am sorry to answer your question so late! If you were my patient, I would tell you to go ahead and take the Clomid. We often start women on Clomid without necessarily waiting for a period. Some women just don't have them often enough for that. Because your cycle is so irregular, you may or may not be developing a dominant follicle,--but probably are not.
Good luck!
Dr B
Hi I was on clomid 5-9 first cycle pregnant now 30wks! You should have started on the right day to make conception more successful I guess starting on 8 won't be effective but you can always ttc naturally keep practising lol then next month start clomid properly. It does work if used properly, ours was! Good luck lots of baby dust