Hello everyone! BBT help please :)

I am very newly ttc and am trying all methods to get some data on when my OD is. I haven’t gone through a full cycle yet but I don’t know if the apps fertile cycle is when I am actually fertile. I have been taking my temps everyday (missed the one that was dotted) and also using OPK but they were all negative. I’ve had EWCM for the last five days. I’m so confused.