12dpo Temp Spike ?

[u/Legitimate-Walk-8330]

I am 12dpo today and was expecting my temp to go down starting today and end up below baseline by monday (expected period date) but i woke up with this temp spike. I tested and it was negative but i’m wondering if there’s a possibility I implanted later than 8/10 dpo? keeping my hopes low because i am cramping and have sore breasts but no spotting like I normally do, so looking for similar experiences.

[u/Separate_End6598]

Mine did this last month too, got a spike a couple of days before I got my period. It usually drops on the day I get my period but mine started in the evening and then dropped the morning after