BBT Dip 5dpo

Megan
Hi! I am new to charting my BBT and I noticed a dip in my temperature and I'm only 5dpo, could this be a sign of implantation? I am too far out from AF for it to be that I think? I was very tired yesterday and have had some light cramping and bloating that normally would subside after ovulation until a few days before AF, I don't know if that has anything to do with it. Any information is welcome! Thanks!