Frustrated

So, I was supposed to start IUI this month, but went in for CD3 US, and had a very large cyst encompassing my entire left ovary. I've never had a history of cysts before... So I was out. Waiting on AF to show so we can try again. Doctor felt confident it would go away on its own. Last month was only a 21 day cycle, and I'm on day 19, so I'm hoping AF will show and that this month will be better. Super depressing!