Help! BBT and Opk not matching!?!

[Ally Rey]

This is our second month ttc and I have been tracking my BBT since mid cycle the first month. I have input my data into different apps such as Flo, FF, and Femometer. One is telling me I O’d on CD 9 the other is saying CD 15 and one isn’t even giving me anything. I did get a positive opk on CD 14 with EWCM that lasted until CD 17! I am very new to this and have been on birth control for the past 8 years. Any thoughts or tips would help. I take my bbt at the same time every morning orally without getting out of bed. All of my symptoms are not inputed into this FF chart but I have them in flo.