Deni, with so few temperatures at the start of your cycle it would be really difficult to say for sure what's gone on. In that case, I'd be much more inclined to believe the OPKs and assume that they are giving a correct indication of when you ovulated.

A dip before ovulation isn't always going to happen, and sometimes temperatures do rise fairly slowly in the first few days after ovulation. It looks to me like the temperature rise you have seen would be enough to confirm ovulation has taken place, particularly in combination with your other signs. However, FF may not be picking it due to the lack of pre-O temperatures. Give it a few more days and see how your temperature changes. BBT charting is more about identifying patterns over time than the sgnificance of one particular temperature in isolation.

Good luck!

BW