Ovulation

Katie🐼 • If at first you don`t conceive... Try, try and try again !
I was wondering if there was a way to tell if you are ovulating ? 
Seeing as apparently bbt and ferning isn't as reliable with pcos 
Lately AF has been reasonably regular (touch wood not to jynx it ) but I know that just because they're regular doesn't mean I'm ovulating I was just wondering if there was a more reliable way of doing it or is it just guessing and BDing as much as possible ? 
Is it a combination of both ferning and bbt ? 
What other techniques are there ? 
Here's my bbt chart and according to the apps I use I did ovulate this month