BBT Chart: Implantation Dip??

juls

I am 10 dpo today. I have had period like cramping on and off since 6dpo, typically it is worse at night, but no spotting yet. My AF is due 9/25 and I typically do not cramp until I start AF. Could the bbt dip yesterday on 9 dpo be an implantation dip? Does my chart look okay otherwise??