Unusual BBT

Kelsey

Hey everyone! Was curious if anybody had an idea of what could be going on with my BBT this cycle. My husband and I are TTC and an ovulation test confirmed peak fertility on the 9th and 10th. Not sure why I had such a drastic dip on 5 DPO with a crazy rise afterwards? I’m trying to not get my hopes up, but I’ve never had a BBT chart look like this before! Any input is welcomed!