Implantation dip?

Jordan

Hi guys! I’m fairly familiar with BBT and ovulation dips but just learned about implantation dips so I charted longer this cycle. Is the dip from 6-7 dpo possibly an implantation dip? It follows all the “rules” I’ve read so far... but can I get a dip like this and still not be pregnant? If it is implantation, how long before I can get a positive pregnancy test? Thanks for the help!! Baby dust for all this holiday!