Thinking of trying OPK

So I’ve been considering trying opk’s this cycle and I was looking for some advice. We have been TTC for roughly a year and a half. I had a chemical August of 17 and haven’t had any luck since then. I recently had a pap and everything and back normal. I’m not sure why I can’t conceive but it’s driving me absolutely insane which I know isn’t helping! We’re getting married November 1st of next year and sometimes I tell myself maybe it’s just not the right time. I just need some advice 😕