I'm just starting taking my btt...how does it work? If my temp is high from the previous day that means I'm ovulating that day? Or that I will be ovulating the next day? Does it mean anything if my bbt keeps going down...for example my temp past 3 days 96.93,96.63 and 96.35...I do run cold bc I have a problem with low iron. I dont have any ovulation test and trying to save money...so I thought bbt would help to figure out the day b4 ovulation...one app is saying the 28th and glow is saying the 2nd...