Help with BBT tracking!

Is anyone here familiar with bbt tracking? I️ took a home pregnancy test 8dpo (early, I️ know!) and it was negative. My temperature usually runs around 97.7 or 97.8 but has been 98.0 lately. My period is due this weekend and today (10dpo) I️ have been having really mild cramping. Is there still a chance I️ could be pregnant based on my bbt chart?