Is it possible at all to ovulate without a rise in bbt? I've been tracking it, but not consistently. I had some type of yeast infection or bv two/three weeks ago, but didn't go to a doctor for it. It might have affected my bbt, I'm guessing. My periods are very irregular, so I track my bbt to know when to expect my AF. Lately, I've been more tired in the mornings and my back has been achy. This morning I threw up but have felt fine otherwise. I'll be taking a test tomorrow, hopefully I am pregnant finally! But I don't see a rise in my temp at all, if anything, it's oddly a bit lower than normal. So is it possible to ovulate without a rise in bbt?