When you got your BFP with clomid, femara, or letrozole..did you time ovulation with opks or did you do the trigger shot??

Just wondering because I did my first round of letrozole and trigger shot last month and got pregnant from the first round. But miscarried at 5 weeks. I was given the option by my specialist that I could either do the trigger or use opks. Now I'm deciding if for this next round if I should do opks or do the trigger again? Which did you do when you got your bfps?