BBT Spike

Marie • Mama after infertility to three 💜💙💙
This is the third cycle I've tracked my BBT and today, DPO 9 (possibly 10) my temp spiked again, but higher than it's ever been. Does this mean anything to anyone? It's normally in the 98-98.5 range post ovulation, but today it was 99.1. I'm not sick, so that's not it.
By the way I have zero pregnancy symptoms this month so I'm not paticularly optimistic.
Anyone??