You may even be in the follicular phase and may catch the egg. No one really knows... Here's some tidbits about BBT Charting.
What is this BBT chart about ?
Follicular phase
Before a woman ovulates, the basal body temperatures range from around 97.0 to 97.5 degrees Fahrenheit (36.1 to 36.3 Celcius). This is due to the presence of estrogen, which keeps temps down. Temperatures will vary from person to person, but should stay below your coverline.
( Coverline shown on the sample chart as red __ __ __ dashed line )
Luteal phase
Once ovulation has occurred, the temps go up to a new, higher level, usually ranging from around 97.6 to 98.9 F ( 36.4 to 36.6 C ).The day after ovulation, the temp generally jumps up by at least 0.2 degrees F ( 0.11 degrees C ), and then continues to rise somewhat. This increase in temperature is caused by the progesterone released from the follicle after ovulation.
It will become apparent after a few days that it is in a new, higher range. The temps themselves will continue to rise and dip day by day, but will remain in the higher range. ( Above your coverline )
The actual temperatures are less important than noting a pattern showing two levels of temperatures. If there is no pregnancy, then your temperature will stay elevated for 10 - 16 days, until the corpus luteum regresses. At this time, progesterone levels drop dramatically and you get your period. Your temperature normally drops at this time as well, though it is not unusual to have erratic or high temperatures during your period.
If your Basal Body Temperature remains elevated for 18 days or more after ovulation, you should probably test for pregnancy.
https://www.baby2see.com/preconception/basal_body_temperature.html
Be aware of factors other than ovulation that can increase BBT: emotional disturbance, stress, a cold or infection, jet lag, drinking alcohol the night before, using an electric blanket.
Dont pull all-nighters: You need to have at least three hours of uninterrupted sleep to get an accurate reading.