Will I ovulate? I need encouragement

I've been using the clear blue advanced opk this cycle, I'm on my 6th day of a high reading & I've been testing twice a day. I am yet to hit a peak, and my period is due the 15th. That means I have only 13 days left in my cycle - a luteal phase is supposed to be 14 days and I've read that if you have longer cycles this could be a problem. 😞 do you think I ovulated on a high reading? Or I still have time left? Thank you very much. Feeling pretty down about ttc. It's month 7 for us.