Ovulation

Kirsty
I'm on cd31 of an irregular cycle. 
​I started getting a lot of pain in my left side which I put down to th cyst I have. 
​I tested with an opk yesterday and it looks to be positive. 
​But I've noticed my bbt has been up in the last 4 days. I bd last Friday and last night. 
​I'm not sure now when I ovulate or if I have