Bottom line is, you must see the entire month as a whole to determine if you ovulated or are indeed pregnant. If you continue to see this seesaw pattern above and below your coverline, you may not have ovulated at all. I've been doing it for my third month now and am just starting to recognize my unique pattern. Another note, is that it takes varying amounts of time between women to see their temperature change. Some women will see this 12 hours after ovulation, some will not see this until 72 or more hours after ovulation.
Progesterone is what causes the temp to rise, and every women responds differently to progesterone.
Charting is a simple thing to do, but sometimes very difficult to interpret. This information is provided for educational purposes only. Please read the disclaimer .