@katham - So sorry to hear af is late, I can relate to that as I am in the same position too. Its typical its late when you have planned work sround it. Hope it turns up soon.
I am awaiting af and its so frustrating as going off past cycles and coming off the provera it should have arrived yesterday and as of yet I haven't experienced any headaches like usual or spotting so it might be a while away! Maybe thats because its straight off a fresh cycle and higher progesterone meds who knows?