OPKs along side Clomid?!

Carry • I’m 29. Stay-at-home-wife. Had a blighted ovum in May 2017. Had a little girl in Aug 2018 and May 2020! Overcome infertility on both sides. Prayers and sticky baby dust to y`all!
Anyone that has used/is using Clomid. Have you used OPKs with it? Did they help you or was they just added stress? What brand work best for you?
I'm in my third round of clomid 50 mg. My levels say I ovulate but I have not got my bfp.