I definitely ovulated and I'm now on 9dpo. My last temps are staying at 97.90 on the dot! I checked with a second BBT thermometer to make sure my batteries are good. 97.90! Has anyone had this happen? I had lower temps 1dpo and 2dpo. It jumped at 4dpo to 97.90. Then it spiked to 98.19 at 6dpo and now I'm back to 97.90 for 3 days straight. (My pre-O temp is 96.6-97.1... So I'm on the low side usually.) Last cycle went triphasic and ended in a chemical pregnancy, but I've NEVER seen a flat BBT. I've been charting consistently for 7 months.