Opks, are they worth it?

We can only get one donation a cycle. I’ve been basing ovulation off of Glo prediction and my body signs. Well we’ve missed it every time. We are one cycle 6 and I’m wanting to do more. I’m doing EPO, fish oil, prenatal, mucinex, preseed and am thinking about doing opks this cycle too. I haven’t used opks consistently before. I am wondering are they worth it? Will they cause stress? We inseminate the day after the first positive opk correct? Any advice regarding opks would be amazing. Thank you!