Confused about my BBT

I am testing my bbt from last 6 days and today I am 8DPO. Today while googling I noticed the temperature after ovulation is above 97.8 F, but my one is lower than that I mean my one is with in 97.1to 97.8F is this normal. I am TTC please let me know can I be in able to conceive this time in this temperature 😣😣