I will agree with the others that posted about reading Taking Charge of Your Fertility. BBT does not tell you when you are going to ovulate only that you DID ovulate (as your temperature drops after you have ovulated).
So, you can keep up the love making until the temp drop OR if you are following your cervical mucus/fluids those tell you exactly when to make love to catch ovulation before it happens.
I eventually stopped temping altogether and only watched my cervical mucus. (This was after a full year of charting and knowing my body). Oh, and be careful of the everyone ovulates give or take around day 14 "rule"...I found out I ovulate around day 26 of my cycle.
We got pregnant the first or second cycle trying with this book every time. (I have gotten pregnant eight times...we had 6 miscarriages due to other issues).
TCOYF is the best resource to help you know your body and get pregnant or in our case now NOT get pregnant (just use it in reverse).
Good luck and most of all have fun!!