11dpo coverline dip..guessing in out?! Advice please

Renae • 💙 '09....💙 '11....💔 '14.... 💔 '14....💔 '15....💔 '16....💔 '17....💜 12/12/17
Omg 1st of all im so glad theres a bbt group. Anyway, this is my 1st month charting my bbt but 12months ttc. Im currently 11dpo and this morning I had a temp dip just below my coverline, does this mean af will show her face or implantation dip?!?! Any advice would be great