Positive OPK without Temp Spike?

Alex • Married to the love of my life and TTC #1!
TTC #1 for 4 months. Got a positive OPK on 11/15 and temp rose from 97.4 to 97.9 on 11/16. My temps are always pretty consistent and don't usually see a dramatic spike. Is it possible I never ovulate?
Thanks for your insight!