Ovidrel and BBT

Rayna • 38 years old and been blessed with our baby boy born 11/25/15 through IVF and countless prayers.
Hi ladies. Have any of you had an experience where you did a trigger shot (like Ovidrel) and did not see a BBT rise indicating ovulation when you expected to?  I used Ovidrel Monday night and had a very positive OPK Wednesday morning. I have not seen a rise in BBT yet. Is this normal and I am just paranoid?