OPK and bbt spike

PTgal💜 • Married 6 years, just had my rainbow, a baby girl, in April. Have pcos, endometriosis, low thyroid, and have had 4 mc.
Hi everyone, I had a positive OPK on cd 15-17 but today is cd 19 and I have yet to see a bbt spike. I took clomid cd 5-9. Any thoughts? Is this normal? Thanks :)