When did I ovulate?

Not sure what’s going on with my temps this cycle...I usually have an obvious temp dip with sustained high temps after to clearly identify the day I ovulated. However, this cycle I had a few dips which make me question the date of ovulation. FF says the 15th (cycle day 17) based on information added to app...but the 17th also looked like it could have been the day...thoughts? Nothing different this cycle...still temping at the same time each morning, no drinking the night before, etc.