Day 66 and counting

My cycles are getting longer and longer. On day 66 today and no sign of period, had two blood tests this cycle so far and no progesterone spike so no ovulation. Doctor has said they will only refer me if next period 21st day blood test shows no ovulation but I'm still waiting for period!!! Without my period I can't be investigated further. It's sad I'm not ovulating but also the long cycles are worrying me. I had a miscarriage last April and I've been like this since, had scan again in August but nothing out the ordinary showed. Sorry for rant but I'm so fed up of this!!!