Opk on clomid??

Jenna • I am a stay at home mom to 1 boy (13) and 4 girls (11,8,5 and 3) we lost another little girl last year and just got a bfp for our 🌈 baby!
I heard that while on clomid sometimes ovulation tests wont always be accurate?? And your ovulation day might be effected?? Im so confused I am on my first cycle and would hate to miss my peak day! Anyone have experience with this?? Thanks in advance (: