when should I expect to ovulate?

Destynee • PCOS • 2 natural born • pregnant with our letrozole baby🤍
I'm pretty irregular I have a picture below that shows my cycle info. I want to catch my ovulation window but OPK's have only found it once and I really don't want to buy a $40 OPK😭 I just got off my period yesterday. I'm just so tired of spending all this money. I just wanted to see if anyone else is having my problem...