OPK ....?

Aubrey • Blessed momma of two girls & Baby BOY coming March ‘20!💗💗💙

So I have never used an OPK and never did with my first pregnancy. It took us 7 months to get pregnant. I found out through a false positive hpt last month that lead to blood work that I did not ovulate last month ?!?! I guess my question is - if I'm not ovulating anyway, what would the point of an OPK be? Wouldn't that be a huge waste of money???