temp drop at 5 dpo?

Brandi
I started temping mid cycle. Finally figured out a way to get bbts with my son waking me at 4:30 or 5 am. But with opks have me at 5dpo. Had almost an entire degree drop this morning.  To early for implation right? Possibly didnt O with the first surge and going to try again? I havnt tempted n a few years since ttc my first. Can someone shed some light on this?