letrozole

I have been taking letrozole to help with my ovulation, I have PCOS. I started cycle day 1 yesterday and typically you take it on days 3-7. I have taken it before on days 4-8 previously. Unfortunately both my doctor and pcp are closed today and on weekends and so I would take it days 5-9. Has anyone else done this and see results? I'm scared it's too late and I have been TTC for almost 2 years next month.