Or it could just be that my temp took its sweet time reaching post-o levels. Not getting my hopes up, though the persistent and stubborn headache is something I did NOT have last month when I thought I must be pregnant, and it's something I have had with my prior pregnancies from day 1. That said, I always worry about that, because it usually just keeps getting worse until it becomes completely unbearable and I can't function (can't walk, etc.) and that's when I MC.
I could just be stressed.
I don't know. It seems too early for me to have implanted already. I'm only 7dpo, 6 if I ovulated a day late. Not getting my hopes up over a headache and elevated temps. If I knew what my pre-o temps were, I could say definitively whether this is a biphasic shift or a triphasic, but I don't. Wahhh!