BBT help please

Meghan • ♡~MommyInTraining~♡

I've been thinking about starting to take my BBT but I don't know what all I need to know...can someone please explain to me what I need to know and how I do it....I would greatly appreciate it. Please.... I need to do something to help.... Just started my period after being a day late ...nothing like a big fuck you from the universe as starting your period on mothers day.